diff --git a/src/display.c b/src/display.c
index d2e2a315..f4a9db69 100644
--- a/src/display.c
+++ b/src/display.c
@@ -27,7 +27,7 @@ void display_serialize(FILE *rsp, uint32_t did)
 {
     CGRect frame = display_bounds(did);
 
-    size_t buffer_size = MAXLEN;
+    int buffer_size = MAXLEN;
     size_t bytes_written = 0;
     char buffer[MAXLEN] = {};
     char *cursor = buffer;
diff --git a/src/view.c b/src/view.c
index 0378856f..a2afc0cf 100644
--- a/src/view.c
+++ b/src/view.c
@@ -441,7 +441,7 @@ void view_flush(struct view *view)
 
 void view_serialize(FILE *rsp, struct view *view)
 {
-    size_t buffer_size = MAXLEN;
+    int buffer_size = MAXLEN;
     size_t bytes_written = 0;
     char buffer[MAXLEN] = {};
     char *cursor = buffer;