--- main/pbx_variables.c_orig	2019-06-24 12:58:16.022453500 +0200
+++ main/pbx_variables.c	2019-06-24 13:46:14.153309847 +0200
@@ -116,12 +116,18 @@
 static int parse_variable_name(char *var, int *offset, int *length, int *isfunc)
 {
 	int parens = 0;
+	int skip_next = 0;
 
 	*offset = 0;
 	*length = INT_MAX;
 	*isfunc = 0;
 	for (; *var; var++) {
-		if (*var == '(') {
+		if (skip_next != 0) {
+			/* skip this char */
+			skip_next = 0;
+		} else if (*var == '\\') {
+			skip_next = 1;
+		} else  if (*var == '(') {
 			(*isfunc)++;
 			parens++;
 		} else if (*var == ')') {