diff --git a/dlls/msctf/range.c b/dlls/msctf/range.c
index 8b1f4822777..dc9eae15c60 100644
--- a/dlls/msctf/range.c
+++ b/dlls/msctf/range.c
@@ -349,11 +349,13 @@ HRESULT Range_Constructor(ITfContext *context, ITextStoreACP *textstore, DWORD l
 
 HRESULT TF_SELECTION_to_TS_SELECTION_ACP(const TF_SELECTION *tf, TS_SELECTION_ACP *tsAcp)
 {
-    Range *This = (Range *)tf->range;
+    Range *This;
 
     if (!tf || !tsAcp || !tf->range)
         return E_INVALIDARG;
 
+    This = (Range *)tf->range;
+
     tsAcp->acpStart = This->anchorStart;
     tsAcp->acpEnd = This->anchorEnd;
     tsAcp->style.ase = tf->style.ase;