1 files changed, 4 insertions, 0 deletions
diff --git a/src/x11.c b/src/x11.c
index 1c34e92..4eb87ce 100644
--- a/src/x11.c
+++ b/src/x11.c
@@ -2013,6 +2013,10 @@ puglSetSizeHint(PuglView* const    view,
                 const PuglSpan     width,
                 const PuglSpan     height)
 {
+  if ((unsigned)hint >= PUGL_NUM_SIZE_HINTS) {
+    return PUGL_BAD_PARAMETER;
+  }
+
   view->sizeHints[hint].width  = width;
   view->sizeHints[hint].height = height;
   return updateSizeHints(view);