diff --git a/src/spicelib/devices/cpl/cplsetup.c b/src/spicelib/devices/cpl/cplsetup.c
index fd4b393d4..579a39936 100644
--- a/src/spicelib/devices/cpl/cplsetup.c
+++ b/src/spicelib/devices/cpl/cplsetup.c
@@ -118,7 +118,7 @@ static int find_roots(double, double, double, double*, double*, double*);
 static NODE* insert_node(char*);
 static NDnamePt insert_ND(char*, NDnamePt*);
 static NODE* NEW_node(void);
-static NDnamePt ndn;
+static NDnamePt ndn_btree;
 static NODE *node_tab;
 #define epsi_mult 1e-28
 
@@ -1878,7 +1878,7 @@ insert_node(char *name)
     NDnamePt n;
     NODE    *p;
 
-    n = insert_ND(name, &ndn);
+    n = insert_ND(name, &ndn_btree);
     if (n->nd == NULL) {
         p = NEW_node();
         p->name = n;
diff --git a/src/spicelib/devices/txl/txlsetup.c b/src/spicelib/devices/txl/txlsetup.c
index a2bca7e10..1bb8d10f9 100644
--- a/src/spicelib/devices/txl/txlsetup.c
+++ b/src/spicelib/devices/txl/txlsetup.c
@@ -46,7 +46,7 @@ static NODE 		*NEW_node(void);
 /*static VI_list_txl *new_vi_txl();*/
 
 NODE     		*node_tab = NULL;
-NDnamePt 		ndn = NULL;
+NDnamePt 		ndn_btree = NULL;
 VI_list_txl 	*pool_vi_txl = NULL;
 
 /* pade.c */
@@ -1057,7 +1057,7 @@ static NODE
    NDnamePt n;
    NODE    *p;
 
-   n = insert_ND(name, &ndn);
+   n = insert_ND(name, &ndn_btree);
    if (n->nd == NULL) {
       p = NEW_node();
       p->name = n;