diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index 8c2f370..2e992bc 100644
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -17,6 +17,7 @@
 #include <linux/kernel.h>
 #include <linux/percpu.h>
 #include <linux/smp.h>
+#include <linux/slab.h>
 #include <asm/byteorder.h>
 #include <asm/processor.h>
 #include <asm/i387.h>