diff --git a/common/os_calls.c b/common/os_calls.c
index ceb581d4..d6adf40c 100644
--- a/common/os_calls.c
+++ b/common/os_calls.c
@@ -1391,7 +1391,7 @@ g_strncasecmp(const char* c1, const char* c2, int len)
 
 /*****************************************************************************/
 int APP_CC
-g_atoi(char* str)
+g_atoi(const char* str)
 {
   if (str == 0)
   {
diff --git a/common/os_calls.h b/common/os_calls.h
index 4296f172..5b9e5bac 100644
--- a/common/os_calls.h
+++ b/common/os_calls.h
@@ -169,7 +169,7 @@ g_strcasecmp(const char* c1, const char* c2);
 int APP_CC
 g_strncasecmp(const char* c1, const char* c2, int len);
 int APP_CC
-g_atoi(char* str);
+g_atoi(const char* str);
 int APP_CC
 g_htoi(char* str);
 int APP_CC