@@ -109,11 +109,12 @@
 
 #if (!defined(HAVE_GMTIME_R) || !defined(HAVE_LOCALTIME_R)) && \
     defined(OF_HAVE_THREADS)
 static OFMutex *mutex;
 
-OF_DESTRUCTOR()
+void
+releaseMutex(void)
 {
 	[mutex release];
 }
 #endif
 
@@ -349,10 +350,11 @@
 	placeholder.isa = [OFDatePlaceholder class];
 
 #if (!defined(HAVE_GMTIME_R) || !defined(HAVE_LOCALTIME_R)) && \
     defined(OF_HAVE_THREADS)
 	mutex = [[OFMutex alloc] init];
+	atexit(releaseMutex);
 #endif
 
 #ifdef OF_WINDOWS
 	if ((module = LoadLibrary("msvcrt.dll")) != NULL)
 		func__mktime64 = (__time64_t (*)(struct tm *))