diff --git a/source/shared_lib/include/platform/sdl/thread.h b/source/shared_lib/include/platform/sdl/thread.h
index 81b519c92..86ed3b648 100644
--- a/source/shared_lib/include/platform/sdl/thread.h
+++ b/source/shared_lib/include/platform/sdl/thread.h
@@ -140,12 +140,12 @@ public:
 		}
 	}
 	inline void p() {
-		SDL_mutexP(mutex);
+		SDL_LockMutex(mutex);
 		refCount++;
 	}
 	inline void v() {
 		refCount--;
-		SDL_mutexV(mutex);
+		SDL_UnlockMutex(mutex);
 	}
 	inline int getRefCount() const { return refCount; }
 
diff --git a/source/shared_lib/sources/platform/sdl/thread.cpp b/source/shared_lib/sources/platform/sdl/thread.cpp
index dc88ba4b8..387553f19 100644
--- a/source/shared_lib/sources/platform/sdl/thread.cpp
+++ b/source/shared_lib/sources/platform/sdl/thread.cpp
@@ -421,12 +421,12 @@ public:
 
 	void Lock() {
 		if(mutex != NULL && *mutex != NULL) {
-			SDL_mutexP(*mutex);
+			SDL_LockMutex(*mutex);
 		}
 	}
 	void ReleaseLock(bool keepMutex=false) {
 		if(mutex != NULL && *mutex != NULL) {
-			SDL_mutexV(*mutex);
+			SDL_UnlockMutex(*mutex);
 
 			if(keepMutex == false) {
 				mutex = NULL;