diff --git a/pkg/sql/logictest/testdata/logic_test/udf_params b/pkg/sql/logictest/testdata/logic_test/udf_params
index 52b75370f957..2c61e8205fde 100644
--- a/pkg/sql/logictest/testdata/logic_test/udf_params
+++ b/pkg/sql/logictest/testdata/logic_test/udf_params
@@ -15,6 +15,9 @@ CREATE FUNCTION f(OUT param INT) RETURNS VOID AS $$ SELECT 1; $$ LANGUAGE SQL;
 statement error pgcode 42P13 pq: function result type must be int because of OUT parameters
 CREATE FUNCTION f(OUT param INT) RETURNS RECORD AS $$ SELECT 1; $$ LANGUAGE SQL;
 
+statement error pgcode 42P13 SQL functions cannot have arguments of type VOID
+CREATE FUNCTION f(param VOID) RETURNS UUID LANGUAGE SQL AS $$ SELECT NULL $$;
+
 statement ok
 CREATE FUNCTION f(OUT param INT) RETURNS INT AS $$ SELECT 1; $$ LANGUAGE SQL;
 
diff --git a/pkg/sql/opt/optbuilder/create_function.go b/pkg/sql/opt/optbuilder/create_function.go
index 26eec349e66c..025bc8edbd2e 100644
--- a/pkg/sql/opt/optbuilder/create_function.go
+++ b/pkg/sql/opt/optbuilder/create_function.go
@@ -175,8 +175,13 @@ func (b *Builder) buildCreateFunction(cf *tree.CreateRoutine, inScope *scope) (o
 		if param.Class == tree.RoutineParamInOut && param.Name == "" {
 			panic(unimplemented.NewWithIssue(121251, "unnamed INOUT parameters are not yet supported"))
 		}
-		if param.IsInParam() && typ.IsPolymorphicType() {
-			sawPolymorphicInParam = true
+		if param.IsInParam() {
+			if typ.Family() == types.VoidFamily {
+				panic(pgerror.Newf(pgcode.InvalidFunctionDefinition, "SQL functions cannot have arguments of type VOID"))
+			}
+			if typ.IsPolymorphicType() {
+				sawPolymorphicInParam = true
+			}
 		}
 		if param.IsOutParam() {
 			outParamTypes = append(outParamTypes, typ)
diff --git a/pkg/workload/schemachange/operation_generator.go b/pkg/workload/schemachange/operation_generator.go
index a481f0260f5b..30dfd8ae83cb 100644
--- a/pkg/workload/schemachange/operation_generator.go
+++ b/pkg/workload/schemachange/operation_generator.go
@@ -3960,7 +3960,8 @@ FROM
 		if typeVal.Identical(types.AnyTuple) ||
 			typeVal.IsWildcardType() ||
 			typeVal == types.RegClass ||
-			typeVal.Family() == types.OidFamily {
+			typeVal.Family() == types.OidFamily ||
+			typeVal.Family() == types.VoidFamily {
 			continue
 		}
 		if pgVectorNotSupported && typeVal.Family() == types.PGVectorFamily {