diff --git a/dlls/msi/msi.c b/dlls/msi/msi.c
index be1eafdb01f..2f2938c5ca5 100644
--- a/dlls/msi/msi.c
+++ b/dlls/msi/msi.c
@@ -395,6 +395,24 @@ UINT WINAPI MsiDetermineApplicablePatchesW(LPCWSTR szProductPackagePath,
     return ERROR_CALL_NOT_IMPLEMENTED;
 }
 
+UINT MsiDeterminePatchSequenceA(LPCSTR szProductCode, LPCSTR szUserSid,
+    MSIINSTALLCONTEXT dwContext, DWORD cPatchInfo, PMSIPATCHSEQUENCEINFOA pPatchInfo)
+{
+    FIXME("(%s, %s, %d, %d, %p): stub!\n", debugstr_a(szProductCode),
+          debugstr_a(szUserSid), dwContext, cPatchInfo, pPatchInfo);
+
+    return ERROR_CALL_NOT_IMPLEMENTED;
+}
+
+UINT MsiDeterminePatchSequenceW(LPCWSTR szProductCode, LPCWSTR szUserSid,
+    MSIINSTALLCONTEXT dwContext, DWORD cPatchInfo, PMSIPATCHSEQUENCEINFOW pPatchInfo)
+{
+    FIXME("(%s, %s, %d, %d, %p): stub!\n", debugstr_w(szProductCode),
+          debugstr_w(szUserSid), dwContext, cPatchInfo, pPatchInfo);
+
+    return ERROR_CALL_NOT_IMPLEMENTED;
+}
+
 static UINT msi_open_package(LPCWSTR product, MSIINSTALLCONTEXT context,
                              MSIPACKAGE **package)
 {
diff --git a/dlls/msi/msi.spec b/dlls/msi/msi.spec
index e1644be8b90..7f0627a82ef 100644
--- a/dlls/msi/msi.spec
+++ b/dlls/msi/msi.spec
@@ -246,8 +246,8 @@
 250 stdcall MsiQueryComponentStateW(wstr wstr long wstr ptr)
 251 stub MsiQueryFeatureStateExA
 252 stub MsiQueryFeatureStateExW
-253 stub MsiDeterminePatchSequenceA
-254 stub MsiDeterminePatchSequenceW
+253 stdcall MsiDeterminePatchSequenceA(str str long long ptr)
+254 stdcall MsiDeterminePatchSequenceW(wstr wstr long long ptr)
 255 stdcall MsiSourceListAddSourceExA(str str long long str long)
 256 stdcall MsiSourceListAddSourceExW(wstr wstr long long wstr long)
 257 stdcall MsiSourceListClearSourceA(str str long long str)