diff --git a/drivers/staging/unisys/visorbus/Makefile b/drivers/staging/unisys/visorbus/Makefile
index 72d4d4429684ac77c10909e0b4753983469f9542..32f199e949ec44a7ed788d8d2103584bc1909164 100644
--- a/drivers/staging/unisys/visorbus/Makefile
+++ b/drivers/staging/unisys/visorbus/Makefile
@@ -13,3 +13,4 @@ ccflags-y += -Idrivers/staging/unisys/include
 ccflags-y += -Idrivers/staging/unisys/common-spar/include
 ccflags-y += -Idrivers/staging/unisys/common-spar/include/channels
 ccflags-y += -Idrivers/staging/unisys/visorutil
+ccflags-y += -Idrivers/staging/unisys/visorbus