diff --git a/main/ast_expr2.c b/main/ast_expr2.c
index 2154a4d8cb..7a55bc16fc 100644
--- a/main/ast_expr2.c
+++ b/main/ast_expr2.c
@@ -2475,7 +2475,7 @@ static char *compose_func_args(struct expr_node *arglist)
 		}
 		t = t->right;
 	}
-	ast_log(LOG_NOTICE,"argbuf uses %d bytes;\n", strlen(argbuf));
+	ast_log(LOG_NOTICE,"argbuf uses %d bytes;\n", (int) strlen(argbuf));
 	return argbuf;
 }
 
diff --git a/main/ast_expr2.y b/main/ast_expr2.y
index d6c5e8eaa6..89baf91bd3 100644
--- a/main/ast_expr2.y
+++ b/main/ast_expr2.y
@@ -647,7 +647,7 @@ static char *compose_func_args(struct expr_node *arglist)
 		}
 		t = t->right;
 	}
-	ast_log(LOG_NOTICE,"argbuf uses %d bytes;\n", strlen(argbuf));
+	ast_log(LOG_NOTICE,"argbuf uses %d bytes;\n", (int) strlen(argbuf));
 	return argbuf;
 }