diff --git a/BPTCEncoder/config/BC7Config.h.in b/BPTCEncoder/config/BC7Config.h.in
index 174a962..5ec05ee 100644
--- a/BPTCEncoder/config/BC7Config.h.in
+++ b/BPTCEncoder/config/BC7Config.h.in
@@ -7,3 +7,4 @@
 // Do we have the proper popcnt instruction defined?
 #cmakedefine NO_INLINE_ASSEMBLY
 #cmakedefine HAS_SSE_POPCNT
+#cmakedefine HAS_SSE_41