diff --git a/drivers/staging/media/atomisp/pci/atomisp2/Makefile b/drivers/staging/media/atomisp/pci/atomisp2/Makefile
index 5e4a3c6b50a05b4ccd0e945873d58f53de7e0d35..2e00837dbd66ed85f9812d737bc5e0bec0e83b19 100644
--- a/drivers/staging/media/atomisp/pci/atomisp2/Makefile
+++ b/drivers/staging/media/atomisp/pci/atomisp2/Makefile
@@ -365,7 +365,7 @@ ifeq ($(CONFIG_ION),y)
 INCLUDES += -I$(srctree)/drivers/staging/android/ion
 endif
 
-DEFINES := -DHRT_HW -DHRT_ISP_CSS_CUSTOM_HOST -DHRT_USE_VIR_ADDRS -DHRT_KERNEL -D__HOST__
+DEFINES := -DHRT_HW -DHRT_ISP_CSS_CUSTOM_HOST -DHRT_USE_VIR_ADDRS -D__HOST__
 #DEFINES += -DUSE_DYNAMIC_BIN
 #DEFINES += -DISP_POWER_GATING
 #DEFINES += -DUSE_INTERRUPTS
diff --git a/drivers/staging/media/atomisp/pci/atomisp2/hrt/hive_isp_css_mm_hrt.h b/drivers/staging/media/atomisp/pci/atomisp2/hrt/hive_isp_css_mm_hrt.h
index 5363c5a9b1314e0a5166df7774d0cd7e9601ff4b..41c6d14ca61104940ead321fe66952d376227e17 100644
--- a/drivers/staging/media/atomisp/pci/atomisp2/hrt/hive_isp_css_mm_hrt.h
+++ b/drivers/staging/media/atomisp/pci/atomisp2/hrt/hive_isp_css_mm_hrt.h
@@ -24,10 +24,6 @@
 #ifndef _hive_isp_css_mm_hrt_h_
 #define _hive_isp_css_mm_hrt_h_
 
-#ifndef HRT_KERNEL
-/* size_t is defined already in kernel mode */
-#include <stdlib.h>
-#endif
 #include <hmm/hmm.h>
 #include <hrt/hive_isp_css_custom_host_hrt.h>