diff --git a/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp b/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
index 7861850dc..e4a94b351 100644
--- a/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
+++ b/src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
@@ -4783,7 +4783,7 @@ VOID WINAPI XTL::EMUPATCH(D3DDevice_CopyRects)
     pHostDestSurface->GetDesc(&DestinationDesc);
 
     // If no rectangles were given, default to 1 (entire surface)
-    if (cRects = 0) {
+    if (cRects == 0) {
         cRects = 1;
     }