diff --git a/MasterPassword/C/build b/MasterPassword/C/build
index ffa69e93..02ef276e 100755
--- a/MasterPassword/C/build
+++ b/MasterPassword/C/build
@@ -249,7 +249,7 @@ mpw-bench() {
 ### TARGETS
 
 haslib() {
-    LC_ALL=C cc -l"$1" 2>&1 | ! grep -q 'library not found'
+    ! LC_ALL=C cc -l"$1" 2>&1 | grep -q 'library not found'
 }
 cc() {
     if hash llvm-gcc 2>/dev/null; then