diff --git a/src/cff/cffgload.c b/src/cff/cffgload.c
index 1c1fb9353..33733896a 100644
--- a/src/cff/cffgload.c
+++ b/src/cff/cffgload.c
@@ -358,6 +358,13 @@
       FT_UShort     advanceX;
       FT_UShort     advanceY;
 
+      if ( ( size->root.metrics.x_ppem < 1 ||
+             size->root.metrics.y_ppem < 1 ) )
+      {
+        error = FT_THROW( Invalid_Size_Handle );
+        return error;
+      }
+
       FT_TRACE3(( "Attemping to load SVG glyph\n" ));
       sfnt = (SFNT_Service)((TT_Face)glyph->root.face)->sfnt;
       error = sfnt->load_svg_doc( (FT_GlyphSlot)glyph, glyph_index );