diff --git a/dlls/msi/msipriv.h b/dlls/msi/msipriv.h
index 5a264dff3ef..4f1ce534cf5 100644
--- a/dlls/msi/msipriv.h
+++ b/dlls/msi/msipriv.h
@@ -768,8 +768,6 @@ extern UINT msi_apply_transforms( MSIPACKAGE *package ) DECLSPEC_HIDDEN;
 
 /* patch functions */
 extern UINT msi_check_patch_applicable( MSIPACKAGE *package, MSISUMMARYINFO *si ) DECLSPEC_HIDDEN;
-extern UINT msi_parse_patch_summary( MSISUMMARYINFO *si, MSIPATCHINFO **patch ) DECLSPEC_HIDDEN;
-extern UINT msi_apply_patch_db( MSIPACKAGE *package, MSIDATABASE *patch_db, MSIPATCHINFO *patch ) DECLSPEC_HIDDEN;
 extern UINT msi_apply_patches( MSIPACKAGE *package ) DECLSPEC_HIDDEN;
 extern UINT msi_apply_registered_patch( MSIPACKAGE *package, LPCWSTR patch_code ) DECLSPEC_HIDDEN;
 
diff --git a/dlls/msi/patch.c b/dlls/msi/patch.c
index b7ee8e7a410..feceabf59e2 100644
--- a/dlls/msi/patch.c
+++ b/dlls/msi/patch.c
@@ -150,7 +150,7 @@ UINT msi_check_patch_applicable( MSIPACKAGE *package, MSISUMMARYINFO *si )
     return ret;
 }
 
-UINT msi_parse_patch_summary( MSISUMMARYINFO *si, MSIPATCHINFO **patch )
+static UINT msi_parse_patch_summary( MSISUMMARYINFO *si, MSIPATCHINFO **patch )
 {
     MSIPATCHINFO *pi;
     UINT r = ERROR_SUCCESS;
@@ -570,7 +570,7 @@ done:
     return r;
 }
 
-UINT msi_apply_patch_db( MSIPACKAGE *package, MSIDATABASE *patch_db, MSIPATCHINFO *patch )
+static UINT msi_apply_patch_db( MSIPACKAGE *package, MSIDATABASE *patch_db, MSIPATCHINFO *patch )
 {
     UINT i, r = ERROR_SUCCESS;
     WCHAR **substorage;