diff --git a/Cabal-syntax/src/Distribution/SPDX/LicenseId.hs b/Cabal-syntax/src/Distribution/SPDX/LicenseId.hs
index 91f2135d4f2..46bed47f2c6 100644
--- a/Cabal-syntax/src/Distribution/SPDX/LicenseId.hs
+++ b/Cabal-syntax/src/Distribution/SPDX/LicenseId.hs
@@ -36,7 +36,7 @@ import qualified Text.PrettyPrint as Disp
 -- | SPDX License identifiers list v3.25
 data LicenseId
     = NullBSD -- ^ @0BSD@, BSD Zero Clause License
-    | 3D_Slicer_1_0 -- ^ @3D-Slicer-1.0@, 3D Slicer License v1.0, SPDX License List 3.25
+    | NN_3D_Slicer_1_0 -- ^ @3D-Slicer-1.0@, 3D Slicer License v1.0, SPDX License List 3.25
     | AAL -- ^ @AAL@, Attribution Assurance License
     | Abstyles -- ^ @Abstyles@, Abstyles License
     | AdaCore_doc -- ^ @AdaCore-doc@, AdaCore Doc License, SPDX License List 3.23, SPDX License List 3.25
@@ -757,7 +757,7 @@ licenseIdMigrationMessage = go where
 -- | License SPDX identifier, e.g. @"BSD-3-Clause"@.
 licenseId :: LicenseId -> String
 licenseId NullBSD = "0BSD"
-licenseId 3D_Slicer_1_0 = "3D-Slicer-1.0"
+licenseId NN_3D_Slicer_1_0 = "3D-Slicer-1.0"
 licenseId AAL = "AAL"
 licenseId Abstyles = "Abstyles"
 licenseId AdaCore_doc = "AdaCore-doc"
@@ -1399,7 +1399,7 @@ licenseId ZPL_2_1 = "ZPL-2.1"
 -- | License name, e.g. @"GNU General Public License v2.0 only"@
 licenseName :: LicenseId -> String
 licenseName NullBSD = "BSD Zero Clause License"
-licenseName 3D_Slicer_1_0 = "3D Slicer License v1.0"
+licenseName NN_3D_Slicer_1_0 = "3D Slicer License v1.0"
 licenseName AAL = "Attribution Assurance License"
 licenseName Abstyles = "Abstyles License"
 licenseName AdaCore_doc = "AdaCore Doc License"
@@ -2886,7 +2886,7 @@ licenseIdList LicenseListVersion_3_23 =
     ]
     ++ bulkOfLicenses
 licenseIdList LicenseListVersion_3_25 =
-    [ 3D_Slicer_1_0
+    [ NN_3D_Slicer_1_0
     , AdaCore_doc
     , Adobe_Display_PostScript
     , Adobe_Utopia