diff --git a/contrib/src/stc/PlatWX.cpp b/contrib/src/stc/PlatWX.cpp
index ab2cb5c06a..68e32fc29f 100644
--- a/contrib/src/stc/PlatWX.cpp
+++ b/contrib/src/stc/PlatWX.cpp
@@ -1201,13 +1201,14 @@ void ListBoxImpl::Append(char *s, int type) {
 void ListBoxImpl::Append(const wxString& text, int type) {
     long count  = GETLB(id)->GetItemCount();
     long itemID  = GETLB(id)->InsertItem(count, wxEmptyString);
+    long idx = -1;
     GETLB(id)->SetItem(itemID, 1, text);
     maxStrWidth = wxMax(maxStrWidth, text.length());
     if (type != -1) {
         wxCHECK_RET(imgTypeMap, wxT("Unexpected NULL imgTypeMap"));
-        long idx = imgTypeMap->Item(type);
-        GETLB(id)->SetItemImage(itemID, idx, idx);
+        idx = imgTypeMap->Item(type);
     }
+    GETLB(id)->SetItemImage(itemID, idx, idx);
 }
 
 void ListBoxImpl::SetList(const char* list, char separator, char typesep) {