diff --git a/renderdoc/driver/d3d11/d3d11_shaderdebug.cpp b/renderdoc/driver/d3d11/d3d11_shaderdebug.cpp
index ea78354ae..19be17a6c 100644
--- a/renderdoc/driver/d3d11/d3d11_shaderdebug.cpp
+++ b/renderdoc/driver/d3d11/d3d11_shaderdebug.cpp
@@ -1175,7 +1175,7 @@ bool D3D11DebugAPIWrapper::CalculateSampleGather(
 
   for(uint32_t i = 0; i < uv.columns; i++)
   {
-    if(texcoordType == 0 && (RDCISFINITE(uv.value.fv[i])))
+    if(texcoordType == 0 && !RDCISFINITE(uv.value.fv[i]))
     {
       RDCWARN("NaN or Inf in texlookup");
       uv.value.fv[i] = 0.0f;