diff --git a/apache2/msc_util.c b/apache2/msc_util.c
index c452e18e..f366ca8f 100644
--- a/apache2/msc_util.c
+++ b/apache2/msc_util.c
@@ -437,7 +437,7 @@ int sql_hex2bytes_inplace(unsigned char *data, int len) {
     }
 
     *d = '\0';
-    return strlen(begin);
+    return strlen((char *)begin);
 }
 
 /**
diff --git a/apache2/re_actions.c b/apache2/re_actions.c
index 7030746d..280452b9 100644
--- a/apache2/re_actions.c
+++ b/apache2/re_actions.c
@@ -1855,7 +1855,7 @@ static apr_status_t msre_action_initcol_execute(modsec_rec *msr, apr_pool_t *mpt
     /* IMP1 We have a function for this now, parse_name_eq_value? */
     s = strstr(data, "=");
     if (s == NULL) return 0;
-    col_name = strtolower_inplace(data);
+    col_name = strtolower_inplace((unsigned char *)data);
     col_key = s + 1;
     *s = '\0';