diff --git a/gtk/gtkeventcontrollerscroll.c b/gtk/gtkeventcontrollerscroll.c
index 1738e0173f..db98d7c51a 100644
--- a/gtk/gtkeventcontrollerscroll.c
+++ b/gtk/gtkeventcontrollerscroll.c
@@ -60,6 +60,8 @@
  **/
 #include "config.h"
 
+#include "math.h"
+
 #include "gtkintl.h"
 #include "gtkwidget.h"
 #include "gtkeventcontrollerprivate.h"