diff --git a/tools/widl/widltypes.h b/tools/widl/widltypes.h
index afca4c0b759..1177c1a00a2 100644
--- a/tools/widl/widltypes.h
+++ b/tools/widl/widltypes.h
@@ -497,6 +497,7 @@ struct _importinfo_t {
 };
 
 struct _importlib_t {
+    int offset;
     char *name;
 
     int version;
diff --git a/tools/widl/write_msft.c b/tools/widl/write_msft.c
index cb4f0f38dd7..4dcbc037021 100644
--- a/tools/widl/write_msft.c
+++ b/tools/widl/write_msft.c
@@ -702,15 +702,15 @@ static void alloc_importinfo(msft_typelib_t *typelib, importinfo_t *importinfo)
 
         guid_idx = ctl2_alloc_guid(typelib, &guid);
 
-        alloc_importfile(typelib, guid_idx, importlib->version&0xffff,
-                         importlib->version>>16, importlib->name);
+        importlib->offset = alloc_importfile(typelib, guid_idx, importlib->version & 0xffff,
+                importlib->version >> 16, importlib->name);
     }
 
     if(importinfo->offset == -1 || !(importinfo->flags & MSFT_IMPINFO_OFFSET_IS_GUID)) {
         MSFT_ImpInfo impinfo;
 
         impinfo.flags = importinfo->flags;
-        impinfo.oImpFile = 0;
+        impinfo.oImpFile = importlib->offset;
 
         if(importinfo->flags & MSFT_IMPINFO_OFFSET_IS_GUID) {
             MSFT_GuidEntry guid;