diff --git a/src/string.cpp b/src/string.cpp
index 727fd80681..6d386c04a9 100644
--- a/src/string.cpp
+++ b/src/string.cpp
@@ -551,7 +551,7 @@ char *strcasestr(const char *haystack, const char *needle)
  */
 static std::string_view SkipGarbage(std::string_view str)
 {
-	while (!str.empty() && (str[0] < '0' || IsInsideMM(str[0], ';', '@' + 1) || IsInsideMM(str[0], '[', '`' + 1) || IsInsideMM(str[0], '{', '~' + 1))) str.remove_prefix(1);
+	while (!str.empty() && (static_cast<uint8_t>(str[0]) < '0' || IsInsideMM(str[0], ';', '@' + 1) || IsInsideMM(str[0], '[', '`' + 1) || IsInsideMM(str[0], '{', '~' + 1))) str.remove_prefix(1);
 	return str;
 }