diff --git a/synchole.sh b/synchole.sh
index 9c7c852..b39b3b4 100755
--- a/synchole.sh
+++ b/synchole.sh
@@ -155,7 +155,7 @@ if ! amipihole; then
 fi
 
 for DEPENDENCY in $DEPENDENCIES; do
-  if ! $(which $DEPENDENCY); then
+  if [ ! $(which $DEPENDENCY) ]; then
     log error "$DEPENDENCY is not installed"
     exit 1
   fi