diff --git a/kernel/zaptel-base.c b/kernel/zaptel-base.c
index dbd6588..d4fc584 100644
--- a/kernel/zaptel-base.c
+++ b/kernel/zaptel-base.c
@@ -60,6 +60,9 @@
 #include <linux/if_ppp.h>
 #endif
 #include <asm/atomic.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
+#include <linux/sched.h>
+#endif
 
 #ifndef CONFIG_OLD_HDLC_API
 #define NEW_HDLC_INTERFACE