diff --git a/.pre-commit-entry.sh b/.pre-commit-entry.sh
index 4f72a41..190c2a2 100755
--- a/.pre-commit-entry.sh
+++ b/.pre-commit-entry.sh
@@ -7,7 +7,7 @@ if ! command -v nix-build; then
   exit 1
 fi
 
-if !command -v nix-instantiate; then
+if ! command -v nix-instantiate; then
   echo 'ERROR: this pre-commit hook requires "nix-instantiate" to be installed first'
   exit 1
 fi