diff --git a/Classes/Utils/Utils.m b/Classes/Utils/Utils.m
index 06ba6f344..8b857cf36 100644
--- a/Classes/Utils/Utils.m
+++ b/Classes/Utils/Utils.m
@@ -28,15 +28,17 @@
 	va_list args;
 	va_start(args, format);
 	NSString *str = [[NSString alloc] initWithFormat:format arguments:args];
+	NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(CFStringGetSystemEncoding());
+	const char *utf8str = [str cStringUsingEncoding:enc];
 	int filesize = 20;
 	const char *filename = strchr(file, '/') ? strrchr(file, '/') + 1 : file;
 	if (severity <= ORTP_DEBUG) {
 		// lol: ortp_debug(XXX) can be disabled at compile time, but ortp_log(ORTP_DEBUG, xxx) will always be valid even
 		//      not in debug build...
-		ortp_debug("%*s:%3d - %s", filesize, filename + MAX((int)strlen(filename) - filesize, 0), line, str.UTF8String);
+		ortp_debug("%*s:%3d - %s", filesize, filename + MAX((int)strlen(filename) - filesize, 0), line, utf8str);
 	} else {
 		ortp_log(severity, "%*s:%3d - %s", filesize, filename + MAX((int)strlen(filename) - filesize, 0), line,
-				 str.UTF8String);
+				 utf8str);
 	}
 	va_end(args);
 }