diff --git a/dlls/mapi32/mapi32.spec b/dlls/mapi32/mapi32.spec
index 4798e69cf1c..7292e528bf6 100644
--- a/dlls/mapi32/mapi32.spec
+++ b/dlls/mapi32/mapi32.spec
@@ -7,8 +7,8 @@
  15 stdcall MAPIAllocateMore@12(long ptr ptr) MAPIAllocateMore
  16 stdcall MAPIFreeBuffer(ptr)
  17 stdcall MAPIFreeBuffer@4(ptr) MAPIFreeBuffer
- 18 stub MAPIAdminProfiles
- 19 stub MAPIAdminProfiles@8
+ 18 stdcall MAPIAdminProfiles(long ptr)
+ 19 stdcall MAPIAdminProfiles@8(long ptr) MAPIAdminProfiles
  20 stdcall MAPIInitialize(ptr)
  21 stdcall MAPIInitialize@4(ptr) MAPIInitialize
  22 stdcall MAPIUninitialize()
diff --git a/dlls/mapi32/mapi32_main.c b/dlls/mapi32/mapi32_main.c
index e2bdebf2fb2..983dc2451dc 100644
--- a/dlls/mapi32/mapi32_main.c
+++ b/dlls/mapi32/mapi32_main.c
@@ -110,3 +110,10 @@ VOID WINAPI MAPIUninitialize(void)
 {
     FIXME("Stub\n");
 }
+
+HRESULT WINAPI MAPIAdminProfiles(ULONG ulFlags,  LPPROFADMIN *lppProfAdmin)
+{
+    FIXME("(%u, %p): stub\n", ulFlags, lppProfAdmin);
+    *lppProfAdmin = NULL;
+    return E_FAIL;
+}