diff --git a/scripts/aspell-pws b/scripts/aspell-pws
index d07597c..4b5e395 100644
--- a/scripts/aspell-pws
+++ b/scripts/aspell-pws
@@ -177,3 +177,4 @@ kfifo
 PTR
 ttt
 tictactoe
+vmalloc
diff --git a/simrupt.c b/simrupt.c
index 696bc20..e24bd8e 100644
--- a/simrupt.c
+++ b/simrupt.c
@@ -9,6 +9,9 @@
 #include <linux/slab.h>
 #include <linux/version.h>
 #include <linux/workqueue.h>
+#if defined(CONFIG_X86)
+#include <linux/vmalloc.h>
+#endif
 
 MODULE_LICENSE("Dual MIT/GPL");
 MODULE_AUTHOR("National Cheng Kung University, Taiwan");