diff --git a/checkconnection.sh b/checkconnection.sh
index d489590..55beb04 100755
--- a/checkconnection.sh
+++ b/checkconnection.sh
@@ -66,8 +66,8 @@ testwithping() {
 #
 
 # Set $curlbin and $pingbin to "0" when not installed (workaround for sh)
-if [[ $curlbin = "" ]]; then curlbin=0; fi
-if [[ $pingbin = "" ]]; then pingbin=0; fi
+if [[ ! $curlbin ]]; then curlbin=0; fi
+if [[ ! $pingbin ]]; then pingbin=0; fi
 
 # Check network
 if [[ -x ${curlbin} ]]; then