diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c
index 38e572faff43..da6a7abd584f 100644
--- a/drivers/hsi/clients/ssi_protocol.c
+++ b/drivers/hsi/clients/ssi_protocol.c
@@ -32,8 +32,6 @@
 #include <linux/hsi/hsi.h>
 #include <linux/hsi/ssi_protocol.h>
 
-void ssi_waketest(struct hsi_client *cl, unsigned int enable);
-
 #define SSIP_TXQUEUE_LEN	100
 #define SSIP_MAX_MTU		65535
 #define SSIP_DEFAULT_MTU	4000
diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c
index 26f2c3c01297..84ba8b875199 100644
--- a/drivers/hsi/controllers/omap_ssi_core.c
+++ b/drivers/hsi/controllers/omap_ssi_core.c
@@ -17,6 +17,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 #include <linux/delay.h>
+#include <linux/hsi/ssi_protocol.h>
 #include <linux/seq_file.h>
 #include <linux/scatterlist.h>
 #include <linux/interrupt.h>
diff --git a/include/linux/hsi/ssi_protocol.h b/include/linux/hsi/ssi_protocol.h
index 2d6f3cfa7dea..972434daa000 100644
--- a/include/linux/hsi/ssi_protocol.h
+++ b/include/linux/hsi/ssi_protocol.h
@@ -24,6 +24,7 @@ int ssip_slave_stop_tx(struct hsi_client *master);
 void ssip_reset_event(struct hsi_client *master);
 
 int ssip_slave_running(struct hsi_client *master);
+void ssi_waketest(struct hsi_client *cl, unsigned int enable);
 
 #endif /* __LINUX_SSIP_SLAVE_H__ */