diff --git a/src/haiku_select.cc b/src/haiku_select.cc
index 74467edf710..f497eb3d24b 100644
--- a/src/haiku_select.cc
+++ b/src/haiku_select.cc
@@ -18,6 +18,7 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
 #include <config.h>
 #include <intprops.h>
+#include <stdckdint.h>
 
 #include <Application.h>
 #include <Bitmap.h>