diff --git a/build-support/factor.sh b/build-support/factor.sh
index c5be9f8957..61450dacb4 100755
--- a/build-support/factor.sh
+++ b/build-support/factor.sh
@@ -142,7 +142,7 @@ check_X11_libraries() {
     check_library_exists GLU
     check_library_exists GL
     check_library_exists X11
-    check_library_exists pango
+    check_library_exists pango-1.0
 }
 
 check_libraries() {