Index: src/threading.h
==================================================================
--- src/threading.h
+++ src/threading.h
@@ -69,11 +69,11 @@
 
 #ifdef OF_HAVE_SCHED_YIELD
 # include <sched.h>
 #endif
 
-#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
+#if defined(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES) || defined(_WIN32)
 # define of_rmutex_t of_mutex_t
 #else
 typedef struct {
 	of_mutex_t mutex;
 	of_tlskey_t count;

Index: src/threading.m
==================================================================
--- src/threading.m
+++ src/threading.m
@@ -31,11 +31,11 @@
 #endif
 
 bool
 of_rmutex_new(of_rmutex_t *rmutex)
 {
-#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
+#if defined(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES) || defined(_WIN32)
 	pthread_mutexattr_t attr;
 
 	if (pthread_mutexattr_init(&attr) != 0)
 		return false;
 
@@ -61,11 +61,11 @@
 }
 
 bool
 of_rmutex_lock(of_rmutex_t *rmutex)
 {
-#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
+#if defined(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES) || defined(_WIN32)
 	return of_mutex_lock(rmutex);
 #else
 	uintptr_t count = (uintptr_t)of_tlskey_get(rmutex->count);
 
 	if (count > 0) {
@@ -88,11 +88,11 @@
 }
 
 bool
 of_rmutex_trylock(of_rmutex_t *rmutex)
 {
-#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
+#if defined(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES) || defined(_WIN32)
 	return of_mutex_trylock(rmutex);
 #else
 	uintptr_t count = (uintptr_t)of_tlskey_get(rmutex->count);
 
 	if (count > 0) {
@@ -115,11 +115,11 @@
 }
 
 bool
 of_rmutex_unlock(of_rmutex_t *rmutex)
 {
-#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
+#if defined(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES) || defined(_WIN32)
 	return of_mutex_unlock(rmutex);
 #else
 	uintptr_t count = (uintptr_t)of_tlskey_get(rmutex->count);
 
 	if (count > 1) {
@@ -140,11 +140,11 @@
 }
 
 bool
 of_rmutex_free(of_rmutex_t *rmutex)
 {
-#ifdef OF_HAVE_RECURSIVE_PTHREAD_MUTEXES
+#if defined(OF_HAVE_RECURSIVE_PTHREAD_MUTEXES) || defined(_WIN32)
 	return of_mutex_free(rmutex);
 #else
 	if (!of_mutex_free(&rmutex->mutex))
 		return false;