diff --git a/pschdir/pschdir.c b/pschdir/pschdir.c
index 8f5f196..bfa65d0 100644
--- a/pschdir/pschdir.c
+++ b/pschdir/pschdir.c
@@ -34,6 +34,9 @@ int main(int argc, char *argv[]){
 		case ENOTDIR:
 			fprintf(stderr, "Not a directory.\n");
 			return EX_NOINPUT;
+		default:
+			fprintf(stderr, "Unknown error.\n");
+			return EX_UNAVAILABLE;
 		}
 	}