diff --git a/examples/common/bounds.cpp b/examples/common/bounds.cpp
index 10e2b180e..42872b90e 100644
--- a/examples/common/bounds.cpp
+++ b/examples/common/bounds.cpp
@@ -157,7 +157,7 @@ void calcObb(Obb& _obb, const void* _vertices, uint32_t _numVertices, uint32_t _
 	Obb best;
 	aabbToObb(best, aabb);
 
-	float angleStep = float(M_PI_2/_steps);
+	float angleStep = float(bx::piHalf/_steps);
 	float ax = 0.0f;
 	float mtx[16];
 
diff --git a/examples/common/camera.cpp b/examples/common/camera.cpp
index 7c3a968a8..e537f57be 100644
--- a/examples/common/camera.cpp
+++ b/examples/common/camera.cpp
@@ -141,9 +141,9 @@ struct Camera
 
 		float right[3] =
 		{
-			sinf(m_horizontalAngle - float(M_PI)/2.0f),
+			sinf(m_horizontalAngle - bx::piHalf),
 			0,
-			cosf(m_horizontalAngle - float(M_PI)/2.0f),
+			cosf(m_horizontalAngle - bx::piHalf),
 		};
 
 		if (m_keys & CAMERA_KEY_UP)
diff --git a/examples/common/imgui/imgui.cpp b/examples/common/imgui/imgui.cpp
index be51739e6..704f70739 100644
--- a/examples/common/imgui/imgui.cpp
+++ b/examples/common/imgui/imgui.cpp
@@ -448,7 +448,7 @@ struct Imgui
 
 		for (int32_t ii = 0; ii < NUM_CIRCLE_VERTS; ++ii)
 		{
-			float a = (float)ii / (float)NUM_CIRCLE_VERTS * (float)(M_PI * 2.0);
+			float a = (float)ii / (float)NUM_CIRCLE_VERTS * (float)(bx::pi * 2.0);
 			m_circleVerts[ii * 2 + 0] = cosf(a);
 			m_circleVerts[ii * 2 + 1] = sinf(a);
 		}