diff --git a/thirdparty/libwebp/src/dsp/cpu.h b/thirdparty/libwebp/src/dsp/cpu.h
index c86540f280..4dbe607aec 100644
--- a/thirdparty/libwebp/src/dsp/cpu.h
+++ b/thirdparty/libwebp/src/dsp/cpu.h
@@ -47,12 +47,12 @@
 // x86 defines.
 
 #if !defined(HAVE_CONFIG_H)
-#if defined(_MSC_VER) && _MSC_VER > 1310 && \
+#if defined(_MSC_VER) && !defined(__clang__) && _MSC_VER > 1310 && \
     (defined(_M_X64) || defined(_M_IX86))
 #define WEBP_MSC_SSE2  // Visual C++ SSE2 targets
 #endif
 
-#if defined(_MSC_VER) && _MSC_VER >= 1500 && \
+#if defined(_MSC_VER) && !defined(__clang__) && _MSC_VER >= 1500 && \
     (defined(_M_X64) || defined(_M_IX86))
 #define WEBP_MSC_SSE41  // Visual C++ SSE4.1 targets
 #endif