diff --git a/src/global.cpp b/src/global.cpp
index 9da66d0..2a62153 100644
--- a/src/global.cpp
+++ b/src/global.cpp
@@ -2282,6 +2282,23 @@ void x264_fatal_exit(const wchar_t* exitMessage, const char* errorBoxMessage)
 	}
 }
 
+/*
+ * Output string to debugger [debug only]
+ */
+void x264_dbg_output_string(const char* format, ...)
+{
+#if X264_DEBUG
+	char buffer[256];
+	va_list args;
+	va_start (args, format);
+	vsnprintf_s(buffer, 256, _TRUNCATE, format, args);
+	OutputDebugStringA(buffer);
+	va_end(args);
+#else
+	THROW("Cannot call this function in a non-debug build!");
+#endif //LAMEXP_DEBUG
+}
+
 /*
  * Entry point checks
  */
diff --git a/src/global.h b/src/global.h
index 8510741..f52edff 100644
--- a/src/global.h
+++ b/src/global.h
@@ -139,6 +139,7 @@ bool x264_change_process_priority(const int priority);
 bool x264_change_process_priority(void *hProcess, const int priority);
 QDate x264_current_date_safe(void);
 const QString &x264_data_path(void);
+void x264_dbg_output_string(const char* format, ...);
 size_t x264_dbg_private_bytes(void);
 x264_cpu_t x264_detect_cpu_features(const int argc, char **argv);
 bool x264_enable_close_button(const QWidget *win, const bool bEnable);
@@ -219,7 +220,7 @@ while(0)
 		RETV = FUNC(__VA_ARGS__); \
 		size_t _privateBytesLeak = (x264_dbg_private_bytes() - _privateBytesBefore) / 1024; \
 		if(_privateBytesLeak > 0) { \
-			x264_dbg_dbg_output_string("\nMemory leak: Lost %u KiloBytes of PrivateUsage memory!\n\n", _privateBytesLeak); \
+			x264_dbg_output_string("\nMemory leak: Lost %u KiloBytes of PrivateUsage memory!\n\n", _privateBytesLeak); \
 		} \
 	} \
 	while(0)