diff --git a/src/hb-ot-layout.hh b/src/hb-ot-layout.hh
index ac55459b6..921fd8106 100644
--- a/src/hb-ot-layout.hh
+++ b/src/hb-ot-layout.hh
@@ -214,7 +214,7 @@ _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
 {
   hb_unicode_funcs_t *unicode = buffer->unicode;
   unsigned int u = info->codepoint;
-  unsigned int gen_cat = (unsigned int) unicode->general_category (u);
+  unsigned int gen_cat = (unsigned int) unicode->modified_general_category (u);
   unsigned int props = gen_cat;
 
   if (u >= 0x80)