diff --git a/RecastDemo/Source/PartitionedMesh.cpp b/RecastDemo/Source/PartitionedMesh.cpp
index f1ed0217..ffdcb3ea 100644
--- a/RecastDemo/Source/PartitionedMesh.cpp
+++ b/RecastDemo/Source/PartitionedMesh.cpp
@@ -18,6 +18,9 @@
 
 #include "PartitionedMesh.h"
 
+#include <cmath>
+#include <cstdlib>
+
 struct IndexedBounds
 {
 	float bmin[2];
diff --git a/RecastDemo/Source/SampleInterfaces.cpp b/RecastDemo/Source/SampleInterfaces.cpp
index b96d1a29..cbdf3379 100644
--- a/RecastDemo/Source/SampleInterfaces.cpp
+++ b/RecastDemo/Source/SampleInterfaces.cpp
@@ -3,6 +3,7 @@
 #include "SDL_opengl.h"
 
 #include <algorithm>
+#include <cstdarg>
 
 #ifdef WIN32
 #	include <io.h>
diff --git a/RecastDemo/Source/Sample_SoloMesh.cpp b/RecastDemo/Source/Sample_SoloMesh.cpp
index 39a58586..874efc76 100644
--- a/RecastDemo/Source/Sample_SoloMesh.cpp
+++ b/RecastDemo/Source/Sample_SoloMesh.cpp
@@ -30,6 +30,7 @@
 #include "Tool_OffMeshConnection.h"
 
 #include <imgui.h>
+#include <cmath>
 
 const char* Sample_SoloMesh::drawModeNames[]{
 	"Input Mesh",