diff --git a/devices/gdevclj.c b/devices/gdevclj.c

index bed13bc..fe17ece 100644

--- a/devices/gdevclj.c

+++ b/devices/gdevclj.c

@@ -254,7 +254,7 @@ clj_media_size(float mediasize[2], gs_param_list *plist)

     gs_param_int_array hwsize;

     int have_pagesize = 0;

-    if ( (param_read_float_array(plist, "HWResolution", &fres) == 0) &&

+    if ( param_read_float_array(plist, "HWResolution", &fres) != 0 ||

           !is_supported_resolution(fres.data) )

         return_error(gs_error_rangecheck);