diff --git a/deps/rcheevos/src/rapi/rc_api_common.c b/deps/rcheevos/src/rapi/rc_api_common.c
index 2987dcf9f6..b449cb954e 100644
--- a/deps/rcheevos/src/rapi/rc_api_common.c
+++ b/deps/rcheevos/src/rapi/rc_api_common.c
@@ -1021,7 +1021,7 @@ int rc_api_init_fetch_image_request(rc_api_request_t* request, const rc_api_fetc
     case RC_IMAGE_TYPE_USER:
       rc_url_builder_append(&builder, "/UserPic/", 9);
       rc_url_builder_append(&builder, api_params->image_name, strlen(api_params->image_name));
-      rc_url_builder_append(&builder, ".png", 9);
+      rc_url_builder_append(&builder, ".png", 4);
       break;
 
     default: