diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index a320990..aa819da 100644
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -10,6 +10,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/random.h>
+#include <linux/slab.h>
 #include <asm/debug.h>
 #include <asm/uaccess.h>