diff --git a/pandatool/src/win-stats/winStats.cxx b/pandatool/src/win-stats/winStats.cxx
index 7818ea5ed8..e40830e189 100644
--- a/pandatool/src/win-stats/winStats.cxx
+++ b/pandatool/src/win-stats/winStats.cxx
@@ -16,6 +16,9 @@
 #include "winStatsServer.h"
 #include "config_pstatclient.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 static const char *toplevel_class_name = "pstats";
diff --git a/pandatool/src/win-stats/winStatsChartMenu.h b/pandatool/src/win-stats/winStatsChartMenu.h
index cc372f0a80..d96a807965 100644
--- a/pandatool/src/win-stats/winStatsChartMenu.h
+++ b/pandatool/src/win-stats/winStatsChartMenu.h
@@ -16,6 +16,9 @@
 
 #include "pandatoolbase.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 class WinStatsMonitor;
diff --git a/pandatool/src/win-stats/winStatsGraph.h b/pandatool/src/win-stats/winStatsGraph.h
index a4f9a61467..82fb04f71d 100644
--- a/pandatool/src/win-stats/winStatsGraph.h
+++ b/pandatool/src/win-stats/winStatsGraph.h
@@ -18,6 +18,9 @@
 #include "winStatsLabelStack.h"
 #include "pmap.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 class WinStatsMonitor;
diff --git a/pandatool/src/win-stats/winStatsLabel.h b/pandatool/src/win-stats/winStatsLabel.h
index 0317f0dcfb..5642cdb8d0 100644
--- a/pandatool/src/win-stats/winStatsLabel.h
+++ b/pandatool/src/win-stats/winStatsLabel.h
@@ -16,6 +16,9 @@
 
 #include "pandatoolbase.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 class WinStatsMonitor;
diff --git a/pandatool/src/win-stats/winStatsLabelStack.h b/pandatool/src/win-stats/winStatsLabelStack.h
index afb8ecf6c7..e7fd1da41f 100644
--- a/pandatool/src/win-stats/winStatsLabelStack.h
+++ b/pandatool/src/win-stats/winStatsLabelStack.h
@@ -17,6 +17,9 @@
 #include "pandatoolbase.h"
 #include "pvector.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 class WinStatsLabel;
diff --git a/pandatool/src/win-stats/winStatsMonitor.h b/pandatool/src/win-stats/winStatsMonitor.h
index de74aa0d68..c70a71507e 100644
--- a/pandatool/src/win-stats/winStatsMonitor.h
+++ b/pandatool/src/win-stats/winStatsMonitor.h
@@ -23,6 +23,9 @@
 #include "pvector.h"
 #include "pmap.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 class WinStatsServer;
diff --git a/pandatool/src/win-stats/winStatsPianoRoll.h b/pandatool/src/win-stats/winStatsPianoRoll.h
index b0c9410003..b130c99b18 100644
--- a/pandatool/src/win-stats/winStatsPianoRoll.h
+++ b/pandatool/src/win-stats/winStatsPianoRoll.h
@@ -20,6 +20,9 @@
 #include "pStatPianoRoll.h"
 #include "pointerTo.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 class WinStatsMonitor;
diff --git a/pandatool/src/win-stats/winStatsStripChart.h b/pandatool/src/win-stats/winStatsStripChart.h
index 59953fbe8c..9e6f91667f 100644
--- a/pandatool/src/win-stats/winStatsStripChart.h
+++ b/pandatool/src/win-stats/winStatsStripChart.h
@@ -20,6 +20,9 @@
 #include "pStatStripChart.h"
 #include "pointerTo.h"
 
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
 #include <windows.h>
 
 class WinStatsMonitor;