diff --git a/dlls/sfc_os/sfc_os.c b/dlls/sfc_os/sfc_os.c
index db03a10e363..070eea77473 100644
--- a/dlls/sfc_os/sfc_os.c
+++ b/dlls/sfc_os/sfc_os.c
@@ -23,6 +23,7 @@
 #include "windef.h"
 #include "winbase.h"
 #include "winerror.h"
+#include "winreg.h"
 #include "sfc.h"
 #include "wine/debug.h"
 
diff --git a/include/sfc.h b/include/sfc.h
index 7a769280a0a..949e6b35832 100644
--- a/include/sfc.h
+++ b/include/sfc.h
@@ -36,6 +36,7 @@ typedef struct _PROTECTED_FILE_DATA {
 
 BOOL WINAPI SfcGetNextProtectedFile(HANDLE, PPROTECTED_FILE_DATA);
 BOOL WINAPI SfcIsFileProtected(HANDLE, LPCWSTR);
+BOOL WINAPI SfcIsKeyProtected(HKEY, LPCWSTR, REGSAM);
 BOOL WINAPI SfpVerifyFile(LPCSTR, LPSTR, DWORD);
 
 #ifdef __cplusplus