diff --git a/dlls/credui/credui.spec b/dlls/credui/credui.spec
index 20146c7791a..974849bcecb 100644
--- a/dlls/credui/credui.spec
+++ b/dlls/credui/credui.spec
@@ -7,10 +7,10 @@
 @ stdcall CredUIParseUserNameW(wstr ptr long ptr long)
 @ stub CredUIPromptForCredentialsA
 @ stdcall CredUIPromptForCredentialsW(ptr wstr ptr long ptr long ptr long ptr long)
-@ stub CredUIReadSSOCredA
-@ stub CredUIReadSSOCredW
-@ stub CredUIStoreSSOCredA
-@ stub CredUIStoreSSOCredW
+@ stdcall CredUIReadSSOCredA(str ptr)
+@ stdcall CredUIReadSSOCredW(wstr ptr)
+@ stdcall CredUIStoreSSOCredA(str str str long)
+@ stdcall CredUIStoreSSOCredW(wstr wstr wstr long)
 @ stub DllCanUnloadNow
 @ stub DllGetClassObject
 @ stub DllRegisterServer
diff --git a/dlls/credui/credui_main.c b/dlls/credui/credui_main.c
index fc7bfe04fd2..dfaa06eaa98 100644
--- a/dlls/credui/credui_main.c
+++ b/dlls/credui/credui_main.c
@@ -249,3 +249,43 @@ DWORD WINAPI CredUIParseUserNameW(PCWSTR pszUserName, PWSTR pszUser,
 
     return ERROR_SUCCESS;
 }
+
+/******************************************************************************
+ *           CredUIStoreSSOCredA [CREDUI.@]
+ */
+DWORD WINAPI CredUIStoreSSOCredA(PCSTR a, PCSTR b, PCSTR c, BOOL f)
+{
+    FIXME("(%s, %s, %s, %d)\n", debugstr_a(a), debugstr_a(b), debugstr_a(c), f);
+    return 0;
+}
+
+/******************************************************************************
+ *           CredUIStoreSSOCredW [CREDUI.@]
+ */
+DWORD WINAPI CredUIStoreSSOCredW(PCWSTR a, PCWSTR b, PCWSTR c, BOOL f)
+{
+    FIXME("(%s, %s, %s, %d)\n", debugstr_w(a), debugstr_w(b), debugstr_w(c), f);
+    return 0;
+}
+
+/******************************************************************************
+ *           CredUIReadSSOCredA [CREDUI.@]
+ */
+DWORD WINAPI CredUIReadSSOCredA(PCSTR a, PSTR *b)
+{
+    FIXME("(%s, %p)\n", debugstr_a(a), b);
+    if (b)
+        *b = NULL;
+    return 0;
+}
+
+/******************************************************************************
+ *           CredUIReadSSOCredW [CREDUI.@]
+ */
+DWORD WINAPI CredUIReadSSOCredW(PCWSTR a, PWSTR *b)
+{
+    FIXME("(%s, %p)\n", debugstr_w(a), b);
+    if (b)
+        *b = NULL;
+    return 0;
+}