diff --git a/src/pl/plperl/plperl.h b/src/pl/plperl/plperl.h
index 16186fc5293..f71119b82b3 100644
--- a/src/pl/plperl/plperl.h
+++ b/src/pl/plperl/plperl.h
@@ -41,6 +41,8 @@
  */
 #ifdef _MSC_VER
 #define __inline__ inline
+/* Work around for using MSVC and Strawberry Perl >= 5.30. */
+#define __builtin_expect(expr, val) (expr)
 #endif
 
 /*