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-rw-r--r--main/pbx.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/main/pbx.c b/main/pbx.c
index 0e4464a63..5f3f77b16 100644
--- a/main/pbx.c
+++ b/main/pbx.c
@@ -1564,7 +1564,7 @@ static void pbx_substitute_variables_helper_full(struct ast_channel *c, struct v
parse_variable_name(vars, &offset, &offset2, &isfunction);
if (isfunction) {
/* Evaluate function */
- if (c)
+ if (c || !headp)
cp4 = ast_func_read(c, vars, workspace, VAR_BUF_SIZE) ? NULL : workspace;
else {
struct varshead old;