diff --git a/dlls/ddraw/device.c b/dlls/ddraw/device.c
index 09880dda0c9..449b5b8dfc4 100644
--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
@@ -4391,7 +4391,7 @@ static DWORD in_plane(UINT plane, D3DVECTOR normal, D3DVALUE origin_plane, D3DVE
 {
     float distance, norm;
 
-    norm = sqrt( normal.u1.x * normal.u1.x + normal.u2.y * normal.u2.y + normal.u3.z * normal.u3.z );
+    norm = sqrtf(normal.u1.x * normal.u1.x + normal.u2.y * normal.u2.y + normal.u3.z * normal.u3.z);
     distance = ( origin_plane + normal.u1.x * center.u1.x + normal.u2.y * center.u2.y + normal.u3.z * center.u3.z ) / norm;
 
     if ( fabs( distance ) < radius ) return D3DSTATUS_CLIPUNIONLEFT << plane;
diff --git a/dlls/ddraw/executebuffer.c b/dlls/ddraw/executebuffer.c
index 2925cfa1ca4..04ea257663e 100644
--- a/dlls/ddraw/executebuffer.c
+++ b/dlls/ddraw/executebuffer.c
@@ -381,11 +381,10 @@ HRESULT d3d_execute_buffer_execute(struct d3d_execute_buffer *buffer,
 			    dst->u7.tu  = src->u7.tu;
 			    dst->u8.tv  = src->u8.tv;
 
-			    /* Now, the matrix multiplication */
-			    dst->u1.sx = (src->u1.x * mat._11) + (src->u2.y * mat._21) + (src->u3.z * mat._31) + (1.0 * mat._41);
-			    dst->u2.sy = (src->u1.x * mat._12) + (src->u2.y * mat._22) + (src->u3.z * mat._32) + (1.0 * mat._42);
-			    dst->u3.sz = (src->u1.x * mat._13) + (src->u2.y * mat._23) + (src->u3.z * mat._33) + (1.0 * mat._43);
-			    dst->u4.rhw = (src->u1.x * mat._14) + (src->u2.y * mat._24) + (src->u3.z * mat._34) + (1.0 * mat._44);
+                            dst->u1.sx = (src->u1.x * mat._11) + (src->u2.y * mat._21) + (src->u3.z * mat._31) + mat._41;
+                            dst->u2.sy = (src->u1.x * mat._12) + (src->u2.y * mat._22) + (src->u3.z * mat._32) + mat._42;
+                            dst->u3.sz = (src->u1.x * mat._13) + (src->u2.y * mat._23) + (src->u3.z * mat._33) + mat._43;
+                            dst->u4.rhw = (src->u1.x * mat._14) + (src->u2.y * mat._24) + (src->u3.z * mat._34) + mat._44;
 
 			    dst->u1.sx = dst->u1.sx / dst->u4.rhw * Viewport->dvScaleX
 				       + Viewport->dwX + Viewport->dwWidth / 2;
@@ -424,11 +423,10 @@ HRESULT d3d_execute_buffer_execute(struct d3d_execute_buffer *buffer,
 			    dst->u7.tu = src->u6.tu;
 			    dst->u8.tv = src->u7.tv;
 
-			    /* Now, the matrix multiplication */
-			    dst->u1.sx = (src->u1.x * mat._11) + (src->u2.y * mat._21) + (src->u3.z * mat._31) + (1.0 * mat._41);
-			    dst->u2.sy = (src->u1.x * mat._12) + (src->u2.y * mat._22) + (src->u3.z * mat._32) + (1.0 * mat._42);
-			    dst->u3.sz = (src->u1.x * mat._13) + (src->u2.y * mat._23) + (src->u3.z * mat._33) + (1.0 * mat._43);
-			    dst->u4.rhw = (src->u1.x * mat._14) + (src->u2.y * mat._24) + (src->u3.z * mat._34) + (1.0 * mat._44);
+                            dst->u1.sx = (src->u1.x * mat._11) + (src->u2.y * mat._21) + (src->u3.z * mat._31) + mat._41;
+                            dst->u2.sy = (src->u1.x * mat._12) + (src->u2.y * mat._22) + (src->u3.z * mat._32) + mat._42;
+                            dst->u3.sz = (src->u1.x * mat._13) + (src->u2.y * mat._23) + (src->u3.z * mat._33) + mat._43;
+                            dst->u4.rhw = (src->u1.x * mat._14) + (src->u2.y * mat._24) + (src->u3.z * mat._34) + mat._44;
 
 			    dst->u1.sx = dst->u1.sx / dst->u4.rhw * Viewport->dvScaleX
 				       + Viewport->dwX + Viewport->dwWidth / 2;
diff --git a/dlls/ddraw/viewport.c b/dlls/ddraw/viewport.c
index f9eddda888f..95df63faf5d 100644
--- a/dlls/ddraw/viewport.c
+++ b/dlls/ddraw/viewport.c
@@ -428,10 +428,10 @@ static HRESULT WINAPI d3d_viewport_TransformVertices(IDirect3DViewport3 *iface,
     outH = lpData->lpHOut;
     for(i = 0; i < dwVertexCount; i++)
     {
-        x = (in[0] * mat._11) + (in[1] * mat._21) + (in[2] * mat._31) + (1.0 * mat._41);
-        y = (in[0] * mat._12) + (in[1] * mat._22) + (in[2] * mat._32) + (1.0 * mat._42);
-        z = (in[0] * mat._13) + (in[1] * mat._23) + (in[2] * mat._33) + (1.0 * mat._43);
-        w = (in[0] * mat._14) + (in[1] * mat._24) + (in[2] * mat._34) + (1.0 * mat._44);
+        x = (in[0] * mat._11) + (in[1] * mat._21) + (in[2] * mat._31) + mat._41;
+        y = (in[0] * mat._12) + (in[1] * mat._22) + (in[2] * mat._32) + mat._42;
+        z = (in[0] * mat._13) + (in[1] * mat._23) + (in[2] * mat._33) + mat._43;
+        w = (in[0] * mat._14) + (in[1] * mat._24) + (in[2] * mat._34) + mat._44;
 
         if(dwFlags & D3DTRANSFORM_CLIPPED)
         {