diff --git a/wlopm.c b/wlopm.c
index 7366395..8b54f30 100644
--- a/wlopm.c
+++ b/wlopm.c
@@ -16,7 +16,6 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#include <ctype.h>
 #include <errno.h>
 #include <signal.h>
 #include <stdbool.h>