diff --git a/internal/compiler/resolve.go b/internal/compiler/resolve.go
index 57e3fbb8df..803cfcb0e3 100644
--- a/internal/compiler/resolve.go
+++ b/internal/compiler/resolve.go
@@ -193,6 +193,14 @@ func resolveCatalogRefs(c *catalog.Catalog, rvs []*pg.RangeVar, args []paramRef,
 					if inode.Number != ref.ref.Number {
 						continue
 					}
+				case *pg.TypeCast:
+					pr, ok := inode.Arg.(*pg.ParamRef)
+					if !ok {
+						continue
+					}
+					if pr.Number != ref.ref.Number {
+						continue
+					}
 				case *pg.NamedArgExpr:
 					pr, ok := inode.Arg.(*pg.ParamRef)
 					if !ok {
diff --git a/internal/endtoend/testdata/func_args_typecast/endtoend.json b/internal/endtoend/testdata/func_args_typecast/endtoend.json
new file mode 100644
index 0000000000..e9665ca4a3
--- /dev/null
+++ b/internal/endtoend/testdata/func_args_typecast/endtoend.json
@@ -0,0 +1,3 @@
+{
+  "experimental_parser_only": true
+}
diff --git a/internal/endtoend/testdata/func_args_typecast/go/db.go b/internal/endtoend/testdata/func_args_typecast/go/db.go
new file mode 100644
index 0000000000..6a99519302
--- /dev/null
+++ b/internal/endtoend/testdata/func_args_typecast/go/db.go
@@ -0,0 +1,29 @@
+// Code generated by sqlc. DO NOT EDIT.
+
+package querytest
+
+import (
+	"context"
+	"database/sql"
+)
+
+type DBTX interface {
+	ExecContext(context.Context, string, ...interface{}) (sql.Result, error)
+	PrepareContext(context.Context, string) (*sql.Stmt, error)
+	QueryContext(context.Context, string, ...interface{}) (*sql.Rows, error)
+	QueryRowContext(context.Context, string, ...interface{}) *sql.Row
+}
+
+func New(db DBTX) *Queries {
+	return &Queries{db: db}
+}
+
+type Queries struct {
+	db DBTX
+}
+
+func (q *Queries) WithTx(tx *sql.Tx) *Queries {
+	return &Queries{
+		db: tx,
+	}
+}
diff --git a/internal/endtoend/testdata/func_args_typecast/go/models.go b/internal/endtoend/testdata/func_args_typecast/go/models.go
new file mode 100644
index 0000000000..4e2b892600
--- /dev/null
+++ b/internal/endtoend/testdata/func_args_typecast/go/models.go
@@ -0,0 +1,5 @@
+// Code generated by sqlc. DO NOT EDIT.
+
+package querytest
+
+import ()
diff --git a/internal/endtoend/testdata/func_args_typecast/go/query.sql.go b/internal/endtoend/testdata/func_args_typecast/go/query.sql.go
new file mode 100644
index 0000000000..8abb20f8e5
--- /dev/null
+++ b/internal/endtoend/testdata/func_args_typecast/go/query.sql.go
@@ -0,0 +1,24 @@
+// Code generated by sqlc. DO NOT EDIT.
+// source: query.sql
+
+package querytest
+
+import (
+	"context"
+)
+
+const plusPositionalCast = `-- name: PlusPositionalCast :one
+SELECT plus($1, $2::INTEGER)
+`
+
+type PlusPositionalCastParams struct {
+	A       int32
+	Column2 int32
+}
+
+func (q *Queries) PlusPositionalCast(ctx context.Context, arg PlusPositionalCastParams) (int32, error) {
+	row := q.db.QueryRowContext(ctx, plusPositionalCast, arg.A, arg.Column2)
+	var plus int32
+	err := row.Scan(&plus)
+	return plus, err
+}
diff --git a/internal/endtoend/testdata/func_args_typecast/query.sql b/internal/endtoend/testdata/func_args_typecast/query.sql
new file mode 100644
index 0000000000..399a5de922
--- /dev/null
+++ b/internal/endtoend/testdata/func_args_typecast/query.sql
@@ -0,0 +1,8 @@
+CREATE FUNCTION plus(a integer, b integer) RETURNS integer AS $$
+    BEGIN
+        RETURN a + b;
+    END;
+$$ LANGUAGE plpgsql;
+
+-- name: PlusPositionalCast :one
+SELECT plus($1, $2::INTEGER);
diff --git a/internal/endtoend/testdata/func_args_typecast/sqlc.json b/internal/endtoend/testdata/func_args_typecast/sqlc.json
new file mode 100644
index 0000000000..ac7c2ed829
--- /dev/null
+++ b/internal/endtoend/testdata/func_args_typecast/sqlc.json
@@ -0,0 +1,11 @@
+{
+  "version": "1",
+  "packages": [
+    {
+      "path": "go",
+      "name": "querytest",
+      "schema": "query.sql",
+      "queries": "query.sql"
+    }
+  ]
+}