diff --git a/core/ustring.cpp b/core/ustring.cpp
index 78685a44b01..84c6eebbf98 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -3970,7 +3970,10 @@ bool String::is_rel_path() const {
 
 String String::get_base_dir() const {
 
-	int basepos = find("://");
+	int basepos = find(":/");
+	if (basepos == -1) {
+		basepos = find(":\\");
+	}
 	String rs;
 	String base;
 	if (basepos != -1) {