diff --git a/src/truetype/ttgload.c b/src/truetype/ttgload.c
index a7e65fbe0..f6d6f9fcd 100644
--- a/src/truetype/ttgload.c
+++ b/src/truetype/ttgload.c
@@ -658,8 +658,10 @@
     }
     else
     {
-      loader->exec->metrics.x_scale = loader->size->metrics.x_scale;
-      loader->exec->metrics.y_scale = loader->size->metrics.y_scale;
+      loader->exec->metrics.x_scale =
+        ((TT_Size)loader->size)->metrics.x_scale;
+      loader->exec->metrics.y_scale =
+        ((TT_Size)loader->size)->metrics.y_scale;
     }
 #endif