diff --git a/src/libGLESv2/renderer/d3d/d3d9/renderer9_utils.cpp b/src/libGLESv2/renderer/d3d/d3d9/renderer9_utils.cpp
index d6f950a..7d7396a 100644
--- a/src/libGLESv2/renderer/d3d/d3d9/renderer9_utils.cpp
+++ b/src/libGLESv2/renderer/d3d/d3d9/renderer9_utils.cpp
@@ -461,7 +461,7 @@
         extensions->textureNPOT = !(deviceCaps.TextureCaps & D3DPTEXTURECAPS_POW2) &&
                                       !(deviceCaps.TextureCaps & D3DPTEXTURECAPS_CUBEMAP_POW2) &&
                                       !(deviceCaps.TextureCaps & D3DPTEXTURECAPS_NONPOW2CONDITIONAL) &&
-                                      !(isWindowsVistaOrGreater() && adapterId.VendorId == VENDOR_ID_AMD);
+                                      !(!isWindowsVistaOrGreater() && adapterId.VendorId == VENDOR_ID_AMD);
     }
     else
     {