diff --git a/glide3x/cvg/init/video.c b/glide3x/cvg/init/video.c
index d2b06d1..d609b62 100644
--- a/glide3x/cvg/init/video.c
+++ b/glide3x/cvg/init/video.c
@@ -131,7 +131,9 @@ FX_EXPORT FxBool FX_CSTYLE sst1InitVideoBuffers(FxU32 *sstbase,
     FxU32 ft_clkdel, memSizeInPages;
     FxU32 nCol, nAux, miscCtrl;
     int memFifoEntries;
+#ifndef DIRECTX
     float vidClkFreq;
+#endif
 
     if(!sst)
         return(FXFALSE);