diff --git a/dlls/secur32/secur32.c b/dlls/secur32/secur32.c
index 5035ec36ce6..c7e353f52be 100644
--- a/dlls/secur32/secur32.c
+++ b/dlls/secur32/secur32.c
@@ -1057,6 +1057,18 @@ BOOLEAN WINAPI GetComputerObjectNameW(
     return status;
 }
 
+SECURITY_STATUS WINAPI AddSecurityPackageA(LPSTR name, SECURITY_PACKAGE_OPTIONS *options)
+{
+    FIXME("(%s %p)\n", debugstr_a(name), options);
+    return E_NOTIMPL;
+}
+
+SECURITY_STATUS WINAPI AddSecurityPackageW(LPWSTR name, SECURITY_PACKAGE_OPTIONS *options)
+{
+    FIXME("(%s %p)\n", debugstr_w(name), options);
+    return E_NOTIMPL;
+}
+
 /***********************************************************************
  *		GetUserNameExA (SECUR32.@)
  */
diff --git a/dlls/secur32/secur32.spec b/dlls/secur32/secur32.spec
index 623ffe54702..8135958fd2a 100644
--- a/dlls/secur32/secur32.spec
+++ b/dlls/secur32/secur32.spec
@@ -6,8 +6,8 @@
 @ stdcall AcquireCredentialsHandleW(wstr wstr long ptr ptr ptr ptr ptr ptr)
 @ stdcall AddCredentialsA(ptr str str long ptr ptr ptr ptr)
 @ stdcall AddCredentialsW(ptr wstr wstr long ptr ptr ptr ptr)
-@ stub AddSecurityPackageA
-@ stub AddSecurityPackageW
+@ stdcall AddSecurityPackageA(str ptr)
+@ stdcall AddSecurityPackageW(wstr ptr)
 @ stdcall ApplyControlToken(ptr ptr)
 @ stdcall CompleteAuthToken(ptr ptr)
 @ stdcall DecryptMessage(ptr ptr long ptr)
diff --git a/include/sspi.h b/include/sspi.h
index 501406fc5eb..9e44a6d3420 100644
--- a/include/sspi.h
+++ b/include/sspi.h
@@ -130,6 +130,18 @@ typedef struct _SecPkgInfoW
     SEC_WCHAR *Comment;
 } SecPkgInfoW, *PSecPkgInfoW;
 
+typedef struct _SECURITY_PACKAGE_OPTIONS {
+  ULONG Size;
+  ULONG Type;
+  ULONG Flags;
+  ULONG SignatureSize;
+  void *Signature;
+} SECURITY_PACKAGE_OPTIONS, *PSECURITY_PACKAGE_OPTIONS;
+
+SECURITY_STATUS WINAPI AddSecurityPackageA(LPSTR,SECURITY_PACKAGE_OPTIONS*);
+SECURITY_STATUS WINAPI AddSecurityPackageW(LPWSTR,SECURITY_PACKAGE_OPTIONS*);
+#define AddSecurityPackage WINELIB_NAME_AW(AddSecurityPackage)
+
 #define SecPkgInfo WINELIB_NAME_AW(SecPkgInfo)
 #define PSecPkgInfo WINELIB_NAME_AW(PSecPkgInfo)