diff --git a/src/emucore/Paddles.cxx b/src/emucore/Paddles.cxx
index 81be0c501..daecb7343 100644
--- a/src/emucore/Paddles.cxx
+++ b/src/emucore/Paddles.cxx
@@ -15,6 +15,8 @@
 // this file, and for a DISCLAIMER OF ALL WARRANTIES.
 //============================================================================
 
+#include <cmath>
+
 #include "Event.hxx"
 #include "Paddles.hxx"