2 files changed, 6 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index 4b2ce3bf..759daaa8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-07-11         Andrew J. Schorr     <aschorr@telemetry-investments.com>
+
+	* gawkapi.c (api_sym_update): Allow val_type to be AWK_UNDEFINED
+	for setting a variable to "", i.e. dupnode(Nnull_string).
+
 2012-07-10         Andrew J. Schorr     <aschorr@telemetry-investments.com>
 
 	* awkgram.y (add_srcfile): Lint warning message for a previously loaded
diff --git a/gawkapi.c b/gawkapi.c
index ad82f6fa..3fa3e3ba 100644
--- a/gawkapi.c
+++ b/gawkapi.c
@@ -468,6 +468,7 @@ api_sym_update(awk_ext_id_t id, const char *name, awk_value_t *value)
 	switch (value->val_type) {
 	case AWK_STRING:
 	case AWK_NUMBER:
+	case AWK_UNDEFINED:
 		if (node->type == Node_var || node->type == Node_var_new) {
 			unref(node->var_value);
 			node->var_value = awk_value_to_node(value);
@@ -477,7 +478,6 @@ api_sym_update(awk_ext_id_t id, const char *name, awk_value_t *value)
 		break;
 
 	case AWK_ARRAY:
-	case AWK_UNDEFINED:
 		return false;	/* not allowed */
 	}