diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 593bb84..449e890 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -6,6 +6,7 @@
 
 #include <linux/init.h>
 #include <linux/pci.h>
+#include <linux/slab.h>
 #include <linux/module.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>