diff --git a/fiber.c b/fiber.c
index dd539c37..3bd2c4ed 100644
--- a/fiber.c
+++ b/fiber.c
@@ -25,7 +25,7 @@ cothread_t co_active() {
 }
 
 cothread_t co_derive(void* memory, unsigned int heapsize, void (*coentry)(void)) {
-  //Windows fibers do not allow users to supply their own memory
+  /* Windows fibers do not allow users to supply their own memory */
   return (cothread_t)0;
 }
 
diff --git a/ppc64v2.c b/ppc64v2.c
index d302a28a..349f87b8 100644
--- a/ppc64v2.c
+++ b/ppc64v2.c
@@ -11,16 +11,16 @@ extern "C" {
 #endif
 
 struct ppc64_context {
-  //GPRs
+  /* GPRs */
   uint64_t gprs[32];
   uint64_t lr;
   uint64_t ccr;
 
-  //FPRs
+  /* FPRs */
   uint64_t fprs[32];
 
   #ifdef __ALTIVEC__
-  //Altivec (VMX)
+  /* Altivec (VMX) */
   uint64_t vmx[12 * 2];
   uint32_t vrsave;
   #endif
@@ -43,7 +43,7 @@ __asm__(
   "swap_context:\n"
   ".cfi_startproc\n"
 
-  //save GPRs
+  /* save GPRs */
   "std 1, 8(4)\n"
   "std 2, 16(4)\n"
   "std 12, 96(4)\n"
@@ -67,15 +67,15 @@ __asm__(
   "std 30, 240(4)\n"
   "std 31, 248(4)\n"
 
-  //save LR
+  /* save LR */
   "mflr 5\n"
   "std 5, 256(4)\n"
 
-  //save CCR
+  /* save CCR */
   "mfcr 5\n"
   "std 5, 264(4)\n"
 
-  //save FPRs
+  /* save FPRs */
   "stfd 14, 384(4)\n"
   "stfd 15, 392(4)\n"
   "stfd 16, 400(4)\n"
@@ -96,7 +96,7 @@ __asm__(
   "stfd 31, 520(4)\n"
 
   #ifdef __ALTIVEC__
-  //save VMX
+  /* save VMX */
   "li 5, 528\n"
   "stvxl 20, 4, 5\n"
   "addi 5, 5, 16\n"
@@ -123,12 +123,12 @@ __asm__(
   "stvxl 31, 4, 5\n"
   "addi 5, 5, 16\n"
 
-  //save VRSAVE
+  /* save VRSAVE */
   "mfvrsave 5\n"
   "stw 5, 736(4)\n"
   #endif
 
-  //restore GPRs
+  /* restore GPRs */
   "ld 1, 8(3)\n"
   "ld 2, 16(3)\n"
   "ld 12, 96(3)\n"
@@ -152,15 +152,15 @@ __asm__(
   "ld 30, 240(3)\n"
   "ld 31, 248(3)\n"
 
-  //restore LR
+  /* restore LR */
   "ld 5, 256(3)\n"
   "mtlr 5\n"
 
-  //restore CCR
+  /* restore CCR */
   "ld 5, 264(3)\n"
   "mtcr 5\n"
 
-  //restore FPRs
+  /* restore FPRs */
   "lfd 14, 384(3)\n"
   "lfd 15, 392(3)\n"
   "lfd 16, 400(3)\n"
@@ -181,7 +181,7 @@ __asm__(
   "lfd 31, 520(3)\n"
 
   #ifdef __ALTIVEC__
-  //restore VMX
+  /* restore VMX */
   "li 5, 528\n"
   "lvxl 20, 3, 5\n"
   "addi 5, 5, 16\n"
@@ -208,12 +208,12 @@ __asm__(
   "lvxl 31, 3, 5\n"
   "addi 5, 5, 16\n"
 
-  //restore VRSAVE
+  /* restore VRSAVE */
   "lwz 5, 720(3)\n"
   "mtvrsave 5\n"
   #endif
 
-  //branch to LR
+  /* branch to LR */
   "blr\n"
 
   ".cfi_endproc\n"
@@ -231,21 +231,21 @@ cothread_t co_derive(void* memory, unsigned int size, void (*coentry)(void)) {
   uint8_t* sp;
   struct ppc64_context* context = (struct ppc64_context*)memory;
 
-  //save current context into new context to initialize it
+  /* save current context into new context to initialize it */
   swap_context(context, context);
 
-  //align stack
+  /* align stack */
   sp = (uint8_t*)memory + size - STACK_ALIGN;
   sp = (uint8_t*)ALIGN(sp, STACK_ALIGN);
 
-  //write 0 for initial backchain
+  /* write 0 for initial backchain */
   *(uint64_t*)sp = 0;
 
-  //create new frame with backchain
+  /* create new frame with backchain */
   sp -= MIN_STACK_FRAME;
   *(uint64_t*)sp = (uint64_t)(sp + MIN_STACK_FRAME);
 
-  //update context with new stack (r1) and entrypoint (r12, lr)
+  /* update context with new stack (r1) and entrypoint (r12, lr) */
   context->gprs[ 1] = (uint64_t)sp;
   context->gprs[12] = (uint64_t)coentry;
   context->lr       = (uint64_t)coentry;
diff --git a/settings.h b/settings.h
index 3bb77264..bd65b151 100644
--- a/settings.h
+++ b/settings.h
@@ -10,33 +10,33 @@
    do not use this unless you are certain your application won't use SSE */
 /* #define LIBCO_NO_SSE */
 
-#if !defined(thread_local) // User can override thread_local for obscure compilers
-  #if !defined(LIBCO_MP) // Running in single-threaded environment
+#if !defined(thread_local) /* User can override thread_local for obscure compilers */
+  #if !defined(LIBCO_MP) /* Running in single-threaded environment */
     #define thread_local
-  #else // Running in multi-threaded environment
-    #if defined(__STDC_VERSION__) // Compiling as C Language
-      #if defined(_MSC_VER) // Don't rely on MSVC's C11 support
+  #else /* Running in multi-threaded environment */
+    #if defined(__STDC_VERSION__) /* Compiling as C Language */
+      #if defined(_MSC_VER) /* Don't rely on MSVC's C11 support */
         #define thread_local __declspec(thread)
-      #elif __STDC_VERSION__ < 201112L // If we are on C90/99
-        #if defined(__clang__) || defined(__GNUC__) // Clang and GCC
+      #elif __STDC_VERSION__ < 201112L /* If we are on C90/99 */
+        #if defined(__clang__) || defined(__GNUC__) /* Clang and GCC */
           #define thread_local __thread
-        #else // Otherwise, we ignore the directive (unless user provides their own)
+        #else /* Otherwise, we ignore the directive (unless user provides their own) */
           #define thread_local
         #endif
-      #else // C11 and newer define thread_local in threads.h
+      #else /* C11 and newer define thread_local in threads.h */
         #include <threads.h>
       #endif
-    #elif defined(__cplusplus) // Compiling as C++ Language
-      #if __cplusplus < 201103L // thread_local is a C++11 feature
+    #elif defined(__cplusplus) /* Compiling as C++ Language */
+      #if __cplusplus < 201103L /* thread_local is a C++11 feature */
         #if defined(_MSC_VER)
           #define thread_local __declspec(thread)
         #elif defined(__clang__) || defined(__GNUC__)
           #define thread_local __thread
-        #else // Otherwise, we ignore the directive (unless user provides their own)
+        #else /* Otherwise, we ignore the directive (unless user provides their own) */
           #define thread_local
         #endif
-      #else // In C++ >= 11, thread_local in a builtin keyword
-        // Don't do anything
+      #else /* In C++ >= 11, thread_local in a builtin keyword */
+        /* Don't do anything */
       #endif
     #endif
   #endif
@@ -55,29 +55,29 @@
    - alignas (TYPE) is equivalent to alignas (alignof (TYPE)).
 */
 #if !defined(alignas) 
-  #if defined(__STDC_VERSION__) // C Language
-    #if defined(_MSC_VER) // Don't rely on MSVC's C11 support
+  #if defined(__STDC_VERSION__) /* C Language */
+    #if defined(_MSC_VER) /* Don't rely on MSVC's C11 support */
       #define alignas(bytes) __declspec(align(bytes))
-    #elif __STDC_VERSION__ >= 201112L // C11 and above
+    #elif __STDC_VERSION__ >= 201112L /* C11 and above */
       #include <stdalign.h>
-    #elif defined(__clang__) || defined(__GNUC__) // C90/99 on Clang/GCC
+    #elif defined(__clang__) || defined(__GNUC__) /* C90/99 on Clang/GCC */
       #define alignas(bytes) __attribute__ ((aligned (bytes)))
-    #else // Otherwise, we ignore the directive (user should provide their own)
+    #else /* Otherwise, we ignore the directive (user should provide their own) */
       #define alignas(bytes)
     #endif
-  #elif defined(__cplusplus) // C++ Language
+  #elif defined(__cplusplus) /* C++ Language */
     #if __cplusplus < 201103L
       #if defined(_MSC_VER)
         #define alignas(bytes) __declspec(align(bytes))
-      #elif defined(__clang__) || defined(__GNUC__) // C++98/03 on Clang/GCC
+      #elif defined(__clang__) || defined(__GNUC__) /* C++98/03 on Clang/GCC */
         #define alignas(bytes) __attribute__ ((aligned (bytes)))
-      #else // Otherwise, we ignore the directive (unless user provides their own)
+      #else /* Otherwise, we ignore the directive (unless user provides their own) */
         #define alignas(bytes)
       #endif
-    #else // C++ >= 11 has alignas keyword
-      // Do nothing
+    #else /* C++ >= 11 has alignas keyword */
+      /* Do nothing */
     #endif
-  #endif // = !defined(__STDC_VERSION__) && !defined(__cplusplus)
+  #endif /* = !defined(__STDC_VERSION__) && !defined(__cplusplus) */
 #endif
 
 #if !defined(LIBCO_ASSERT)