diff --git a/src/type1/t1objs.c b/src/type1/t1objs.c
index e092b2b..fa990c2 100644
--- a/src/type1/t1objs.c
+++ b/src/type1/t1objs.c
@@ -271,7 +271,7 @@
       /* now compute the maximum advance width */
 
 
-      root->max_advance_width = face->type1.font_bbox.xMax;
+      root->max_advance_width = (FT_Short)face->type1.font_bbox.xMax;
       {
         FT_Int  max_advance;