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--- a/src/common/rclconfig.cpp
+++ b/src/common/rclconfig.cpp
@@ -554,7 +554,9 @@
     string fmiss = path_cat(getConfDir(), "missing");
     FILE *fp = fopen(fmiss.c_str(), "w");
     if (fp) {
-	fwrite(s.c_str(), s.size(), 1, fp);
+	if (fwrite(s.c_str(), s.size(), 1, fp) != 1) {
+            LOGERR(("storeMissingHelperDesc: fwrite failed\n"));
+        }
 	fclose(fp);
     }
 }