diff --git a/config.c b/config.c
index 8db9c77098..2b79fe76ad 100644
--- a/config.c
+++ b/config.c
@@ -3115,7 +3115,7 @@ static int git_config_copy_or_rename_section_in_file(const char *config_filename
 	}
 
 	while (fgets(buf, sizeof(buf), config_file)) {
-		int i;
+		unsigned i;
 		int length;
 		int is_section = 0;
 		char *output = buf;