diff --git a/arch/sandbox/include/asm/clk.h b/arch/sandbox/include/asm/clk.h
index df7156f..1daf2e7 100644
--- a/arch/sandbox/include/asm/clk.h
+++ b/arch/sandbox/include/asm/clk.h
@@ -39,6 +39,7 @@
 	SANDBOX_CLK_TEST_ID_FIXED,
 	SANDBOX_CLK_TEST_ID_SPI,
 	SANDBOX_CLK_TEST_ID_I2C,
+	SANDBOX_CLK_TEST_ID_I2C_ROOT,
 	SANDBOX_CLK_TEST_ID_DEVM1,
 	SANDBOX_CLK_TEST_ID_DEVM2,
 	SANDBOX_CLK_TEST_ID_DEVM_NULL,