diff --git a/dlls/wintrust/wintrust_priv.h b/dlls/wintrust/wintrust_priv.h
index 148e161aee5..66c925ade5f 100644
--- a/dlls/wintrust/wintrust_priv.h
+++ b/dlls/wintrust/wintrust_priv.h
@@ -18,14 +18,14 @@
 #ifndef __WINTRUST_PRIV_H__
 #define __WINTRUST_PRIV_H__
 
-void * WINAPI WINTRUST_Alloc(DWORD cb) __WINE_ALLOC_SIZE(1);
-void WINAPI WINTRUST_Free(void *p);
-BOOL WINAPI WINTRUST_AddStore(CRYPT_PROVIDER_DATA *data, HCERTSTORE store);
+void * WINAPI WINTRUST_Alloc(DWORD cb) __WINE_ALLOC_SIZE(1) DECLSPEC_HIDDEN;
+void WINAPI WINTRUST_Free(void *p) DECLSPEC_HIDDEN;
+BOOL WINAPI WINTRUST_AddStore(CRYPT_PROVIDER_DATA *data, HCERTSTORE store) DECLSPEC_HIDDEN;
 BOOL WINAPI WINTRUST_AddSgnr(CRYPT_PROVIDER_DATA *data,
- BOOL fCounterSigner, DWORD idxSigner, CRYPT_PROVIDER_SGNR *sgnr);
+ BOOL fCounterSigner, DWORD idxSigner, CRYPT_PROVIDER_SGNR *sgnr) DECLSPEC_HIDDEN;
 BOOL WINAPI WINTRUST_AddCert(CRYPT_PROVIDER_DATA *data, DWORD idxSigner,
- BOOL fCounterSigner, DWORD idxCounterSigner, PCCERT_CONTEXT pCert2Add);
+ BOOL fCounterSigner, DWORD idxCounterSigner, PCCERT_CONTEXT pCert2Add) DECLSPEC_HIDDEN;
 BOOL WINAPI WINTRUST_AddPrivData(CRYPT_PROVIDER_DATA *data,
- CRYPT_PROVIDER_PRIVDATA *pPrivData2Add);
+ CRYPT_PROVIDER_PRIVDATA *pPrivData2Add) DECLSPEC_HIDDEN;
 
 #endif /* ndef __WINTRUST_PRIV_H__ */