--- spack-src/util/fluxbox-remote.cc.org	2019-11-08 16:22:55.647747144 +0900
+++ spack-src/util/fluxbox-remote.cc	2019-11-08 16:23:15.709859444 +0900
@@ -73,7 +73,7 @@
     if (strcmp(cmd, "result") == 0) {
         XTextProperty text_prop;
         if (XGetTextProperty(disp, root, &text_prop, atom_result) != 0
-            && text_prop.value > 0
+            && text_prop.value != 0
             && text_prop.nitems > 0) {
 
             printf("%s", text_prop.value);