diff --git a/sys/i386/include/pcpu.h b/sys/i386/include/pcpu.h
--- a/sys/i386/include/pcpu.h
+++ b/sys/i386/include/pcpu.h
@@ -86,7 +86,8 @@
 	uint32_t pc_pad[4];						\
 	uint8_t	pc_mds_tmp[64];						\
 	u_int	pc_ipi_bitmap;						\
-	char	__pad[3518]
+	u_int	pc_small_core;						\
+	char	__pad[3514]
 
 #ifdef _KERNEL