diff --git a/libs/pbd/pbd/floating.h b/libs/pbd/pbd/floating.h
index 105a976637..6daef5d4aa 100644
--- a/libs/pbd/pbd/floating.h
+++ b/libs/pbd/pbd/floating.h
@@ -26,6 +26,8 @@
 #ifndef __libpbd__floating_h__
 #define __libpbd__floating_h__
 
+#include <stdint.h>
+
 #include <cmath>
 
 namespace PBD {