diff --git a/dll/win32/mshtml/main.c b/dll/win32/mshtml/main.c
index 9ea088e73c1..18e4ffb7730 100644
--- a/dll/win32/mshtml/main.c
+++ b/dll/win32/mshtml/main.c
@@ -30,6 +30,13 @@
 HINSTANCE hInst;
 DWORD mshtml_tls = TLS_OUT_OF_INDEXES;
 
+void (__cdecl *ccp_init)(ExternalCycleCollectionParticipant*,const CCObjCallback*);
+nsrefcnt (__cdecl *ccref_incr)(nsCycleCollectingAutoRefCnt*,nsISupports*);
+nsrefcnt (__cdecl *ccref_decr)(nsCycleCollectingAutoRefCnt*,nsISupports*,ExternalCycleCollectionParticipant*);
+void (__cdecl *ccref_init)(nsCycleCollectingAutoRefCnt*,nsrefcnt);
+void (__cdecl *describe_cc_node)(nsCycleCollectingAutoRefCnt*,const char*,nsCycleCollectionTraversalCallback*);
+void (__cdecl *note_cc_edge)(nsISupports*,const char*,nsCycleCollectionTraversalCallback*);
+
 static HINSTANCE shdoclc = NULL;
 static HDC display_dc;
 static WCHAR *status_strings[IDS_STATUS_LAST-IDS_STATUS_FIRST+1];
diff --git a/dll/win32/mshtml/mshtml_private.h b/dll/win32/mshtml/mshtml_private.h
index fb375b4afa9..df72fda159c 100644
--- a/dll/win32/mshtml/mshtml_private.h
+++ b/dll/win32/mshtml/mshtml_private.h
@@ -298,12 +298,12 @@ typedef struct {
 
 DEFINE_GUID(IID_nsXPCOMCycleCollectionParticipant, 0x9674489b,0x1f6f,0x4550,0xa7,0x30, 0xcc,0xae,0xdd,0x10,0x4c,0xf9);
 
-nsrefcnt (__cdecl *ccref_incr)(nsCycleCollectingAutoRefCnt*,nsISupports*) DECLSPEC_HIDDEN;
-nsrefcnt (__cdecl *ccref_decr)(nsCycleCollectingAutoRefCnt*,nsISupports*,ExternalCycleCollectionParticipant*) DECLSPEC_HIDDEN;
-void (__cdecl *ccref_init)(nsCycleCollectingAutoRefCnt*,nsrefcnt) DECLSPEC_HIDDEN;
-void (__cdecl *ccp_init)(ExternalCycleCollectionParticipant*,const CCObjCallback*) DECLSPEC_HIDDEN;
-void (__cdecl *describe_cc_node)(nsCycleCollectingAutoRefCnt*,const char*,nsCycleCollectionTraversalCallback*) DECLSPEC_HIDDEN;
-void (__cdecl *note_cc_edge)(nsISupports*,const char*,nsCycleCollectionTraversalCallback*) DECLSPEC_HIDDEN;
+extern nsrefcnt (__cdecl *ccref_incr)(nsCycleCollectingAutoRefCnt*,nsISupports*) DECLSPEC_HIDDEN;
+extern nsrefcnt (__cdecl *ccref_decr)(nsCycleCollectingAutoRefCnt*,nsISupports*,ExternalCycleCollectionParticipant*) DECLSPEC_HIDDEN;
+extern void (__cdecl *ccref_init)(nsCycleCollectingAutoRefCnt*,nsrefcnt) DECLSPEC_HIDDEN;
+extern void (__cdecl *ccp_init)(ExternalCycleCollectionParticipant*,const CCObjCallback*) DECLSPEC_HIDDEN;
+extern void (__cdecl *describe_cc_node)(nsCycleCollectingAutoRefCnt*,const char*,nsCycleCollectionTraversalCallback*) DECLSPEC_HIDDEN;
+extern void (__cdecl *note_cc_edge)(nsISupports*,const char*,nsCycleCollectionTraversalCallback*) DECLSPEC_HIDDEN;
 
 void init_dispex(DispatchEx*,IUnknown*,dispex_static_data_t*) DECLSPEC_HIDDEN;
 void release_dispex(DispatchEx*) DECLSPEC_HIDDEN;