diff --git a/aarch64.c b/aarch64.c
index b3ffcc49..2132b4e5 100644
--- a/aarch64.c
+++ b/aarch64.c
@@ -5,8 +5,10 @@
 #include <assert.h>
 #include <stdlib.h>
 #include <stdint.h>
-#include <unistd.h>
-#include <sys/mman.h>
+#ifdef LIBCO_MPROTECT
+  #include <unistd.h>
+  #include <sys/mman.h>
+#endif
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/amd64.c b/amd64.c
index e9424c0b..e96e5247 100644
--- a/amd64.c
+++ b/amd64.c
@@ -98,8 +98,10 @@ static void (*co_swap)(cothread_t, cothread_t) = 0;
     0xff, 0xe0,              /* jmp rax          */
   };
 
-  #include <unistd.h>
-  #include <sys/mman.h>
+  #ifdef LIBCO_MPROTECT
+    #include <unistd.h>
+    #include <sys/mman.h>
+  #endif
 
   static void co_init() {
     #ifdef LIBCO_MPROTECT
diff --git a/arm.c b/arm.c
index 95adf6b2..1c9dff5c 100644
--- a/arm.c
+++ b/arm.c
@@ -4,8 +4,10 @@
 
 #include <assert.h>
 #include <stdlib.h>
-#include <unistd.h>
-#include <sys/mman.h>
+#ifdef LIBCO_MPROTECT
+  #include <unistd.h>
+  #include <sys/mman.h>
+#endif
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/ppc.c b/ppc.c
index 6b7f4acd..ee6a9a87 100644
--- a/ppc.c
+++ b/ppc.c
@@ -8,7 +8,7 @@
 #include <stdint.h>
 #include <string.h>
 
-#if LIBCO_MPROTECT
+#ifdef LIBCO_MPROTECT
   #include <unistd.h>
   #include <sys/mman.h>
 #endif
diff --git a/x86.c b/x86.c
index fa1c538f..c539a299 100644
--- a/x86.c
+++ b/x86.c
@@ -52,8 +52,10 @@ static const unsigned char co_swap_function[4096] = {
     #endif
   }
 #else
-  #include <unistd.h>
-  #include <sys/mman.h>
+  #ifdef LIBCO_MPROTECT
+    #include <unistd.h>
+    #include <sys/mman.h>
+  #endif
 
   static void co_init() {
     #ifdef LIBCO_MPROTECT