src/actions.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/actions.c b/src/actions.c
index d42a63a..1f5a0d1 100644
--- a/src/actions.c
+++ b/src/actions.c
@@ -30,6 +30,8 @@
 #include <libintl.h>
 #define _(String) gettext (String)
 
+#include <ctype.h>
+
 /* Handle a control c by either exiting pdmenu or doing nothing. */
 void Handle_Ctrl_C() {
   if (Q_Exits) {