diff --git a/src/include/storage/barrier.h b/src/include/storage/barrier.h
index 1768e65c6b7..a54a74c1a3e 100644
--- a/src/include/storage/barrier.h
+++ b/src/include/storage/barrier.h
@@ -53,6 +53,7 @@ extern slock_t dummy_spinlock;
 /*
  * icc defines __GNUC__, but doesn't support gcc's inline asm syntax
  */
+#include <emmintrin.h>
 #define pg_memory_barrier()		_mm_mfence()
 #define pg_compiler_barrier()	__memory_barrier()
 #elif defined(__GNUC__)