diff --git a/pandatool/src/win-stats/winStatsStripChart.cxx b/pandatool/src/win-stats/winStatsStripChart.cxx
index 827ef4cdf3..428f1fcf36 100644
--- a/pandatool/src/win-stats/winStatsStripChart.cxx
+++ b/pandatool/src/win-stats/winStatsStripChart.cxx
@@ -18,6 +18,7 @@
 
 #include "winStatsStripChart.h"
 #include "winStatsMonitor.h"
+#include "pStatCollectorDef.h"
 #include "numeric_types.h"
 
 static const int default_strip_chart_width = 400;