diff --git a/src/smw/objects/moving/WalkingEnemy.cpp b/src/smw/objects/moving/WalkingEnemy.cpp
index 69a6461e..ca80c863 100644
--- a/src/smw/objects/moving/WalkingEnemy.cpp
+++ b/src/smw/objects/moving/WalkingEnemy.cpp
@@ -13,6 +13,8 @@
 #include "objects/carriable/CO_Shell.h"
 #include "objects/carriable/CO_ThrowBox.h"
 
+#include <cmath>
+
 extern CPlayer* GetPlayerFromGlobalID(short iGlobalID);
 
 extern CMap* g_map;
diff --git a/src/smw/objects/overmap/WO_OrbitHazard.cpp b/src/smw/objects/overmap/WO_OrbitHazard.cpp
index 878d9b27..d7d6d703 100644
--- a/src/smw/objects/overmap/WO_OrbitHazard.cpp
+++ b/src/smw/objects/overmap/WO_OrbitHazard.cpp
@@ -3,6 +3,8 @@
 #include "player.h"
 #include "ResourceManager.h"
 
+#include <cmath>
+
 extern CResourceManager* rm;
 
 
diff --git a/src/smw/objects/overmap/WO_StraightPathHazard.cpp b/src/smw/objects/overmap/WO_StraightPathHazard.cpp
index 8d5f9e5e..51a18168 100644
--- a/src/smw/objects/overmap/WO_StraightPathHazard.cpp
+++ b/src/smw/objects/overmap/WO_StraightPathHazard.cpp
@@ -5,6 +5,8 @@
 #include "player.h"
 #include "ResourceManager.h"
 
+#include <cmath>
+
 extern CEyecandyContainer eyecandy[3];
 extern CResourceManager* rm;