diff --git a/include/FFmpegUtilities.h b/include/FFmpegUtilities.h
index e3df704b..8a0b7705 100644
--- a/include/FFmpegUtilities.h
+++ b/include/FFmpegUtilities.h
@@ -91,12 +91,11 @@
 	#endif
 
 	// This wraps an unsafe C macro to be C++ compatible function
-	static const std::string av_make_error_string(int errnum)
+	inline static const std::string av_make_error_string(int errnum)
 	{
 		char errbuf[AV_ERROR_MAX_STRING_SIZE];
 		av_strerror(errnum, errbuf, AV_ERROR_MAX_STRING_SIZE);
-		std::string errstring(errbuf);
-		return errstring;
+		return (std::string)errbuf;
 	}
 
 	// Redefine the C macro to use our new C++ function