--- a/acinclude.m4
+++ b/acinclude.m4
@@ -661,8 +661,6 @@ AC_DEFUN([AC_W3M_IMAGE],
      with_gtk2="yes"
      if test x"$PKG_CONFIG" = x; then
        PKG_CONFIG=pkg-config
-     else
-       PKG_CONFIG=:
      fi;;
    esac
   done