diff --git a/siplib/qtlib.c b/siplib/qtlib.c
index 88432b7..9bf065a 100644
--- a/siplib/qtlib.c
+++ b/siplib/qtlib.c
@@ -95,9 +95,9 @@ PyObject *sip_api_invoke_slot(const sipSlot *slot, PyObject *sigargs)
     /* Fan out TQt signals.  (Only PyTQt3 will do this.) */
     if (slot->name != NULL && slot->name[0] != '\0')
     {
-        assert(sipTQtSupport->qt_emit_signal);
+        assert(sipTQtSupport->tqt_emit_signal);
 
-        if (sipTQtSupport->qt_emit_signal(slot->pyobj, slot->name, sigargs) < 0)
+        if (sipTQtSupport->tqt_emit_signal(slot->pyobj, slot->name, sigargs) < 0)
             return NULL;
 
         Py_INCREF(Py_None);
diff --git a/siplib/sip.h b/siplib/sip.h
index ddd3320..e7c5fe7 100644
--- a/siplib/sip.h
+++ b/siplib/sip.h
@@ -1386,7 +1386,7 @@ typedef struct _sipTQtAPI {
     int (*qt_disconnect)(void *, const char *, void *, const char *);
     int (*qt_same_name)(const char *, const char *);
     sipSlot *(*qt_find_sipslot)(void *, void **);
-    int (*qt_emit_signal)(PyObject *, const char *, PyObject *);
+    int (*tqt_emit_signal)(PyObject *, const char *, PyObject *);
     int (*qt_connect_py_signal)(PyObject *, const char *, PyObject *,
             const char *);
     void (*qt_disconnect_py_signal)(PyObject *, const char *, PyObject *,