diff --git a/polymer/eduke32/build/src/kplib.c b/polymer/eduke32/build/src/kplib.c
index 5fec662c1..aba2fa864 100644
--- a/polymer/eduke32/build/src/kplib.c
+++ b/polymer/eduke32/build/src/kplib.c
@@ -56,8 +56,12 @@ static __inline int32_t _lrotl(int32_t i, int sh) { return (i >> (-sh)) | (i <<
 #define _fileno fileno
 #else
 #include <io.h>
+#ifdef __clang__
+#include <emmintrin.h>
+#else
 #include <intrin.h>
 #endif
+#endif
 
 #if defined(_WIN32)
 #define WIN32_LEAN_AND_MEAN