4 files changed, 6 insertions, 6 deletions

diff --git a/apps/plugin.h b/apps/plugin.h
index be08091eba..2bcdffb344 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -203,7 +203,7 @@ struct plugin_api {
     void (*bitswap)(unsigned char *data, int length);
 #endif
     struct user_settings* global_settings;
-    void (*backlight_set_timeout)(unsigned int index);
+    void (*backlight_set_timeout)(int index);
 };
 
 /* defined by the plugin loader (plugin.c) */
diff --git a/firmware/backlight.c b/firmware/backlight.c
index d3b4580daa..1e8ef3d3ab 100644
--- a/firmware/backlight.c
+++ b/firmware/backlight.c
@@ -126,9 +126,9 @@ int backlight_get_timeout(void)
     return backlight_timeout;
 }
 
-void backlight_set_timeout(unsigned int index)
+void backlight_set_timeout(int index)
 {
-    if(index >= sizeof(backlight_timeout_value))
+    if(index >= sizeof(backlight_timeout_value) || index < 0)
         /* if given a weird value, use 0 */
         index=0;
     backlight_timeout = index; /* index in the backlight_timeout_value table */
diff --git a/firmware/export/backlight.h b/firmware/export/backlight.h
index d0bfc62e2e..d80f2bbe61 100644
--- a/firmware/export/backlight.h
+++ b/firmware/export/backlight.h
@@ -24,7 +24,7 @@ void backlight_on(void);
 void backlight_off(void);
 void backlight_tick(void);
 int  backlight_get_timeout(void);
-void backlight_set_timeout(int seconds);
+void backlight_set_timeout(int index);
 bool backlight_get_on_when_charging(void);
 void backlight_set_on_when_charging(bool yesno);
 extern const char backlight_timeout_value[];
diff --git a/uisimulator/common/stubs.c b/uisimulator/common/stubs.c
index 533b909786..23a6728db4 100644
--- a/uisimulator/common/stubs.c
+++ b/uisimulator/common/stubs.c
@@ -114,9 +114,9 @@ bool simulate_usb(void)
     return false;
 }
 
-void backlight_set_timeout(int seconds)
+void backlight_set_timeout(int index)
 {
-  (void)seconds;
+  (void)index;
 }
 
 void backlight_set_on_when_charging(bool beep)