@@ -114,11 +114,11 @@
 	[mutex release];
 }
 #endif
 
 #ifdef OF_WINDOWS
-static __time64_t (*func__mktime64)(struct tm *);
+static __time64_t (*_mktime64FuncPtr)(struct tm *);
 #endif
 
 #ifdef HAVE_GMTIME_R
 # define GMTIME_RET(field)						\
 	OFTimeInterval timeInterval = self.timeIntervalSince1970;	\
@@ -352,11 +352,11 @@
 	atexit(releaseMutex);
 #endif
 
 #ifdef OF_WINDOWS
 	if ((module = LoadLibrary("msvcrt.dll")) != NULL)
-		func__mktime64 = (__time64_t (*)(struct tm *))
+		_mktime64FuncPtr = (__time64_t (*)(struct tm *))
 		    GetProcAddress(module, "_mktime64");
 #endif
 
 #if defined(OF_OBJFW_RUNTIME) && UINTPTR_MAX == UINT64_MAX
 	dateTag = objc_registerTaggedPointerClass([OFTaggedPointerDate class]);
@@ -475,12 +475,12 @@
 	    UTF8String + string.UTF8StringLength)
 		@throw [OFInvalidFormatException exception];
 
 	if (tz == SHRT_MAX) {
 #ifdef OF_WINDOWS
-		if (func__mktime64 != NULL) {
-			if ((seconds = func__mktime64(&tm)) == -1)
+		if (_mktime64FuncPtr != NULL) {
+			if ((seconds = _mktime64FuncPtr(&tm)) == -1)
 				@throw [OFInvalidFormatException exception];
 		} else {
 #endif
 			if ((seconds = mktime(&tm)) == -1)
 				@throw [OFInvalidFormatException exception];