diff --git a/sqlite3.go b/sqlite3.go
index 1855eb0..89c2e17 100644
--- a/sqlite3.go
+++ b/sqlite3.go
@@ -382,15 +382,15 @@ func (c *SQLiteConn) RegisterFunc(name string, impl interface{}, pure bool) erro
 	if pure {
 		opts |= C.SQLITE_DETERMINISTIC
 	}
-	rv := sqlite3_create_function(c.db, cname, C.int(numArgs), C.int(opts), C.uintptr_t(newHandle(c, &fi)), C.callbackTrampoline, nil, nil)
+	rv := sqlite3_create_function(c.db, cname, C.int(numArgs), C.int(opts), newHandle(c, &fi), C.callbackTrampoline, nil, nil)
 	if rv != C.SQLITE_OK {
 		return c.lastError()
 	}
 	return nil
 }
 
-func sqlite3_create_function(db *C.sqlite3, zFunctionName *C.char, nArg C.int, eTextRep C.int, pApp C.uintptr_t, xFunc unsafe.Pointer, xStep unsafe.Pointer, xFinal unsafe.Pointer) C.int {
-	return C._sqlite3_create_function(db, zFunctionName, nArg, eTextRep, pApp, (*[0]byte)(unsafe.Pointer(xFunc)), (*[0]byte)(unsafe.Pointer(xStep)), (*[0]byte)(unsafe.Pointer(xFinal)))
+func sqlite3_create_function(db *C.sqlite3, zFunctionName *C.char, nArg C.int, eTextRep C.int, pApp C.uintptr, xFunc unsafe.Pointer, xStep unsafe.Pointer, xFinal unsafe.Pointer) C.int {
+	return C._sqlite3_create_function(db, zFunctionName, nArg, eTextRep, C.uintptr_t(pApp), (*[0]byte)(unsafe.Pointer(xFunc)), (*[0]byte)(unsafe.Pointer(xStep)), (*[0]byte)(unsafe.Pointer(xFinal)))
 }
 
 // AutoCommit return which currently auto commit or not.
diff --git a/tracecallback.go b/tracecallback.go
index 9c42791..27dc72b 100644
--- a/tracecallback.go
+++ b/tracecallback.go
@@ -358,7 +358,7 @@ func (c *SQLiteConn) RegisterAggregator(name string, impl interface{}, pure bool
 	if pure {
 		opts |= C.SQLITE_DETERMINISTIC
 	}
-	rv := sqlite3_create_function(c.db, cname, C.int(stepNArgs), C.int(opts), C.uintptr_t(newHandle(c, &ai)), nil, C.stepTrampoline, C.doneTrampoline)
+	rv := sqlite3_create_function(c.db, cname, C.int(stepNArgs), C.int(opts), newHandle(c, &ai), nil, C.stepTrampoline, C.doneTrampoline)
 	if rv != C.SQLITE_OK {
 		return c.lastError()
 	}