4 files changed, 6 insertions, 6 deletions

diff --git a/uisimulator/common/lcd-common.c b/uisimulator/common/lcd-common.c
index f00e9a28b2..c69ef06f1f 100644
--- a/uisimulator/common/lcd-common.c
+++ b/uisimulator/common/lcd-common.c
@@ -30,7 +30,7 @@
  #include "lcd-x11.h"
 #endif
 
-void lcd_blit(unsigned char* p_data, int x, int y, int width, int height,
+void lcd_blit(const unsigned char* p_data, int x, int y, int width, int height,
               int stride)
 {
     (void)p_data;
diff --git a/uisimulator/common/lcd-playersim.c b/uisimulator/common/lcd-playersim.c
index ed633b849f..3f3453b9a1 100644
--- a/uisimulator/common/lcd-playersim.c
+++ b/uisimulator/common/lcd-playersim.c
@@ -222,7 +222,7 @@ void lcd_double_height(bool on)
     lcd_update();
 }
 
-void lcd_define_hw_pattern(int which, char *pattern, int length)
+void lcd_define_hw_pattern(int which, const char *pattern, int length)
 {
     int i, j;
     int pat = which / 8;
diff --git a/uisimulator/win32/timefuncs.h b/uisimulator/win32/timefuncs.h
index 57bb3de5ce..8fbc5b1c85 100644
--- a/uisimulator/win32/timefuncs.h
+++ b/uisimulator/win32/timefuncs.h
@@ -4,5 +4,5 @@
 
 /* struct tm defined */
 struct tm *get_time(void);
-int set_time(struct tm *tm);
-bool valid_time(struct tm *tm);
+int set_time(const struct tm *tm);
+bool valid_time(const struct tm *tm);
diff --git a/uisimulator/x11/timefuncs.h b/uisimulator/x11/timefuncs.h
index 59e8b249eb..de17fcdc73 100644
--- a/uisimulator/x11/timefuncs.h
+++ b/uisimulator/x11/timefuncs.h
@@ -3,5 +3,5 @@
 
 /* struct tm defined */
 struct tm *get_time(void);
-int set_time(struct tm *tm);
-bool valid_time(struct tm *tm);
+int set_time(const struct tm *tm);
+bool valid_time(const struct tm *tm);