diff --git a/nix/overlays/haskell-packages.nix b/nix/overlays/haskell-packages.nix
index b57ed1cd..94835e04 100644
--- a/nix/overlays/haskell-packages.nix
+++ b/nix/overlays/haskell-packages.nix
@@ -332,7 +332,7 @@ in {
                 owner = "awakesecurity";
                 repo = "proto3-wire";
                 rev = "2a8e434b1b7686a26c9848cc6906c07389658a04"; # 1.4.4
-                sha256 = "fGPcpv1AFLbmEg9ZRiBbto3el49pHfPIIxQT6U2mebp=";
+                sha256 = "92dcADQg7bSD3zGPfLXzyHQndGMKRTFLPt0Pei2ZTws=";
               };
             in
               pkgsNew.haskell.lib.doJailbreak
diff --git a/proto3-suite.cabal b/proto3-suite.cabal
index bf81170d..416012c9 100644
--- a/proto3-suite.cabal
+++ b/proto3-suite.cabal
@@ -133,7 +133,7 @@ library
                        safe ==0.3.*,
                        split,
                        system-filepath,
-                       template-haskell >=2.17 && <2.22,
+                       template-haskell >=2.17 && <2.23,
                        text >= 0.2 && <2.2,
                        text-short >=0.1.3 && <0.2,
                        time,
diff --git a/src/Proto3/Suite/DotProto/Generate/Syntax.hs b/src/Proto3/Suite/DotProto/Generate/Syntax.hs
index f4a4353c..6eb5d6fc 100644
--- a/src/Proto3/Suite/DotProto/Generate/Syntax.hs
+++ b/src/Proto3/Suite/DotProto/Generate/Syntax.hs
@@ -784,7 +784,12 @@ closedTyFamDecl_ tyFamName famBndrs resultKind eqns =
 #else
               eqnBndrs
 #endif
-          , feqn_pats = map HsValArg pats
+          , feqn_pats = map
+              (HsValArg
+#if MIN_VERSION_ghc(9,10,0)
+                        synDef
+#endif
+              ) pats
           , feqn_fixity = Prefix
           , feqn_rhs = rhs
           }
@@ -810,7 +815,12 @@ tyFamInstDecl_ tyFamName bndrs pats rhs = noLocA $ GHC.InstD NoExtField TyFamIns
 #else
                 bndrs
 #endif
-            , feqn_pats = map HsValArg pats
+            , feqn_pats = map
+                (HsValArg
+#if MIN_VERSION_ghc(9,10,0)
+                          synDef
+#endif
+                ) pats
             , feqn_fixity = Prefix
             , feqn_rhs = rhs
             }