diff --git a/configure b/configure
index 2d149cc2863..bf4dd7d611f 100755
--- a/configure
+++ b/configure
@@ -13872,6 +13872,7 @@ done
 
 
 
+
 
 
 for ac_header in \
@@ -13903,6 +13904,7 @@ for ac_header in \
 	netinet/tcp.h \
 	netinet/tcp_fsm.h \
 	openssl/ssl.h \
+	pthread.h \
 	pty.h \
 	pwd.h \
 	regex.h \
diff --git a/configure.ac b/configure.ac
index acb71d3779b..b8852eccfe7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1020,6 +1020,7 @@ AC_CHECK_HEADERS(\
 	netinet/tcp.h \
 	netinet/tcp_fsm.h \
 	openssl/ssl.h \
+	pthread.h \
 	pty.h \
 	pwd.h \
 	regex.h \
diff --git a/dlls/kernel/pthread.c b/dlls/kernel/pthread.c
index 7fd4754cc11..4104a4f7581 100644
--- a/dlls/kernel/pthread.c
+++ b/dlls/kernel/pthread.c
@@ -22,6 +22,8 @@
 #include "config.h"
 #include "wine/port.h"
 
+#ifdef HAVE_PTHREAD_H
+
 #define _GNU_SOURCE /* we may need to override some GNU extensions */
 
 #include <assert.h>
@@ -53,8 +55,6 @@ static const struct wine_pthread_functions functions;
 
 DECL_GLOBAL_CONSTRUCTOR(pthread_init) { wine_pthread_init_process( &functions ); }
 
-static inline int init_done(void) { return GetProcessHeap() != 0; }
-
 /* NOTE: This is a truly extremely incredibly ugly hack!
  * But it does seem to work... */
 
@@ -176,7 +176,6 @@ static void mutex_real_init( pthread_mutex_t *mutex )
 
 static int wine_pthread_mutex_lock(pthread_mutex_t *mutex)
 {
-  if (!init_done()) return 0;
   if (!((wine_mutex)mutex)->critsect)
     mutex_real_init( mutex );
 
@@ -186,7 +185,6 @@ static int wine_pthread_mutex_lock(pthread_mutex_t *mutex)
 
 static int wine_pthread_mutex_trylock(pthread_mutex_t *mutex)
 {
-  if (!init_done()) return 0;
   if (!((wine_mutex)mutex)->critsect)
     mutex_real_init( mutex );
 
@@ -251,7 +249,6 @@ static int wine_pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
 
 static int wine_pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 {
-  if (!init_done()) return 0;
   if (!((wine_rwlock)rwlock)->lock)
     rwlock_real_init( rwlock );
 
@@ -262,7 +259,6 @@ static int wine_pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
 
 static int wine_pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
 {
-  if (!init_done()) return 0;
   if (!((wine_rwlock)rwlock)->lock)
     rwlock_real_init( rwlock );
 
@@ -275,7 +271,6 @@ static int wine_pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
 
 static int wine_pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
 {
-  if (!init_done()) return 0;
   if (!((wine_rwlock)rwlock)->lock)
     rwlock_real_init( rwlock );
 
@@ -286,7 +281,6 @@ static int wine_pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
 
 static int wine_pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
 {
-  if (!init_done()) return 0;
   if (!((wine_rwlock)rwlock)->lock)
     rwlock_real_init( rwlock );
 
@@ -585,3 +579,5 @@ static const struct wine_pthread_functions functions =
     wine_pthread_cond_wait,         /* ptr_pthread_cond_wait */
     wine_pthread_cond_timedwait     /* ptr_pthread_cond_timedwait */
 };
+
+#endif /* HAVE_PTHREAD_H */
diff --git a/include/config.h.in b/include/config.h.in
index d80532a879e..acb44f4bc27 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -395,6 +395,9 @@
 /* Define to 1 if you have the `pread' function. */
 #undef HAVE_PREAD
 
+/* Define to 1 if you have the <pthread.h> header file. */
+#undef HAVE_PTHREAD_H
+
 /* Define to 1 if the system has the type `pthread_rwlockattr_t'. */
 #undef HAVE_PTHREAD_RWLOCKATTR_T
 
diff --git a/libs/wine/port.c b/libs/wine/port.c
index ee54806bae6..d6751fb4b0c 100644
--- a/libs/wine/port.c
+++ b/libs/wine/port.c
@@ -38,8 +38,35 @@
 #endif
 
 #include "wine/library.h"
+
+#ifdef HAVE_PTHREAD_H
+
 #include "wine/pthread.h"
 
+/***********************************************************************
+ *           wine_pthread_init_process
+ *
+ * This function is just a placeholder, it will be overridden by the pthread support code.
+ */
+void wine_pthread_init_process( const struct wine_pthread_functions *functions )
+{
+    assert(0);  /* we must never get here */
+}
+
+
+/***********************************************************************
+ *           wine_pthread_init_thread
+ *
+ * This function is just a placeholder, it will be overridden by the pthread support code.
+ */
+void wine_pthread_init_thread(void)
+{
+    assert(0);  /* we must never get here */
+}
+
+#endif  /* HAVE_PTHREAD_H */
+
+
 /***********************************************************************
  *           wine_switch_to_stack
  *
@@ -93,28 +120,6 @@ __ASM_GLOBAL_FUNC( wine_switch_to_stack,
 #endif
 
 
-/***********************************************************************
- *           wine_pthread_init_process
- *
- * This function is just a placeholder, it will be overridden by the pthread support code.
- */
-void wine_pthread_init_process( const struct wine_pthread_functions *functions )
-{
-    assert(0);  /* we must never get here */
-}
-
-
-/***********************************************************************
- *           wine_pthread_init_thread
- *
- * This function is just a placeholder, it will be overridden by the pthread support code.
- */
-void wine_pthread_init_thread(void)
-{
-    assert(0);  /* we must never get here */
-}
-
-
 #if (defined(__svr4__) || defined(__NetBSD__)) && !defined(MAP_TRYFIXED)
 /***********************************************************************
  *             try_mmap_fixed