diff --git a/configure.ac b/configure.ac
index a4fdd8d..3d2303b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1065,7 +1065,8 @@ then
         AC_CHECK_TYPES(FT_TrueTypeEngineType,,,[#include <freetype/ftmodapi.h>])
         ac_save_CFLAGS="$CFLAGS"
         CFLAGS="$CFLAGS $ac_freetype_libs"
-        AC_CHECK_FUNCS(FT_Load_Sfnt_Table)
+        AC_CHECK_FUNCS(FT_Load_Sfnt_Table \
+                       FT_LcdFilter)
         CFLAGS="$ac_save_CFLAGS"
 	CPPFLAGS="$ac_save_CPPFLAGS"
 	dnl Check that we have at least freetype/freetype.h