diff --git a/polymer/eduke32/build/include/mutex.h b/polymer/eduke32/build/include/mutex.h
index 4582eef91..987a141bd 100644
--- a/polymer/eduke32/build/include/mutex.h
+++ b/polymer/eduke32/build/include/mutex.h
@@ -3,11 +3,9 @@
 
 /* Mutual exclusion mechanism wrappers for the different platforms */
 
-#if defined(_WIN32)
+#ifdef RENDERTYPEWIN
 # include <windows.h>
 # include <process.h>
-#elif !defined GEKKO
-# include <pthread.h>
 #else
 # include "sdl_inc.h"
 #endif
@@ -16,10 +14,8 @@
 extern "C" {
 #endif
 
-#if defined(_WIN32)
+#ifdef RENDERTYPEWIN
 typedef HANDLE mutex_t;
-#elif !defined GEKKO
-typedef pthread_mutex_t mutex_t;
 #else
 /* PK: I don't like pointer typedefs, but SDL_CreateMutex() _returns_ one,
  *     so we're out of luck with our interface. */
diff --git a/polymer/eduke32/build/src/mutex.c b/polymer/eduke32/build/src/mutex.c
index 6be0e323b..9d6e4ed6f 100644
--- a/polymer/eduke32/build/src/mutex.c
+++ b/polymer/eduke32/build/src/mutex.c
@@ -3,11 +3,9 @@
 
 int32_t mutex_init(mutex_t *mutex)
 {
-#ifdef _WIN32
+#ifdef RENDERTYPEWIN
     *mutex = CreateMutex(0, FALSE, 0);
     return (*mutex == 0);
-#elif !defined GEKKO
-    return pthread_mutex_init(mutex, NULL);
 #else
     if (mutex)
     {
@@ -21,10 +19,8 @@ int32_t mutex_init(mutex_t *mutex)
 
 int32_t mutex_lock(mutex_t *mutex)
 {
-#ifdef _WIN32
+#ifdef RENDERTYPEWIN
     return (WaitForSingleObject(*mutex, INFINITE) == WAIT_FAILED);
-#elif !defined GEKKO
-    return pthread_mutex_lock(mutex);
 #else
     return SDL_LockMutex(*mutex);
 #endif
@@ -32,10 +28,8 @@ int32_t mutex_lock(mutex_t *mutex)
 
 int32_t mutex_unlock(mutex_t *mutex)
 {
-#ifdef _WIN32
+#ifdef RENDERTYPEWIN
     return (ReleaseMutex(*mutex) == 0);
-#elif !defined GEKKO
-    return pthread_mutex_unlock(mutex);
 #else
     return SDL_UnlockMutex(*mutex);
 #endif