diff --git a/apps/gui/skin_engine/skin_parser.c b/apps/gui/skin_engine/skin_parser.c
index 17fd82b8b3..f3819142f7 100644
--- a/apps/gui/skin_engine/skin_parser.c
+++ b/apps/gui/skin_engine/skin_parser.c
@@ -1720,7 +1720,7 @@ static bool wps_parse(struct wps_data *data, const char *wps_bufptr, bool debug)
  * except fields which need to survive, i.e.
  * 
  **/
-void skin_data_reset(struct wps_data *wps_data)
+static void skin_data_reset(struct wps_data *wps_data)
 {
 #ifdef HAVE_LCD_BITMAP
     wps_data->images = NULL;
diff --git a/apps/gui/usb_screen.c b/apps/gui/usb_screen.c
index 87b0761745..fb09d3ea61 100644
--- a/apps/gui/usb_screen.c
+++ b/apps/gui/usb_screen.c
@@ -35,6 +35,7 @@
 #include "settings.h"
 #include "led.h"
 #include "appevents.h"
+#include "usb_screen.h"
 
 #ifdef HAVE_LCD_BITMAP
 #include "bitmaps/usblogo.h"
diff --git a/firmware/target/arm/as3525/debug-as3525.c b/firmware/target/arm/as3525/debug-as3525.c
index f8f183d432..be78bca0e0 100644
--- a/firmware/target/arm/as3525/debug-as3525.c
+++ b/firmware/target/arm/as3525/debug-as3525.c
@@ -79,7 +79,7 @@ static inline unsigned read_cp15 (void)
     return (cp15_value);
 }
 
-int calc_freq(int clk)
+static int calc_freq(int clk)
 {
     int out_div;
     unsigned int prediv = ((unsigned int)CGU_PROC>>2) & 0x3;