--- configure.orig	2023-01-27 12:08:58 UTC
+++ configure
@@ -6384,8 +6384,7 @@ printf "%s\n" "$FLTK_CONFIG" >&6; }
       FLTK_API_VERSION="`$FLTK_CONFIG --api-version`"
       if test $? -ne 0; then
           as_fn_error $? "$FLTK_CONFIG failed" "$LINENO" 5
-      fi
-      if test "x$FLTK_API_VERSION" = "x1.1" || test "x$FLTK_API_VERSION" = "x1.3"; then
+      else
           HAVE_FLTK_API_VERSION=yes
       fi
       if test "${HAVE_FLTK_API_VERSION}" = "no"; then