diff --git a/forth_interp.c b/forth_interp.c
index 27247a8..fe10c76 100644
--- a/forth_interp.c
+++ b/forth_interp.c
@@ -32,7 +32,7 @@ void process_token(const char* token) {
     if (w != NULL) {
         if (state == 0) { // Interpret mode
             if (w->code == do_docolon) { // Colon definition
-                ret_push(NULL); // Return address to stop interpreter
+                ret_push_ip(NULL); // Return address to stop interpreter
                 ip = w->body;
                 inner_interpreter();
             } else { // Primitive word
@@ -41,7 +41,7 @@ void process_token(const char* token) {
         } else { // Compile mode
             if (w->flags & (1 << 7)) { // Immediate word: execute now
                 if (w->code == do_docolon) {
-                    ret_push(NULL);
+                    ret_push_ip(NULL);
                     ip = w->body;
                     inner_interpreter();
                 } else {