diff --git a/src/include/storage/bufmgr.h b/src/include/storage/bufmgr.h
index 46b4e0d90f3..7c1e4316dde 100644
--- a/src/include/storage/bufmgr.h
+++ b/src/include/storage/bufmgr.h
@@ -384,7 +384,7 @@ BufferGetBlock(Buffer buffer)
 static inline Size
 BufferGetPageSize(Buffer buffer)
 {
-	AssertMacro(BufferIsValid(buffer));
+	Assert(BufferIsValid(buffer));
 	return (Size) BLCKSZ;
 }