diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c
index 181c715be33d000ba1d9fdd6e18e4845815f9277..5ce5a180e80148556a11d5909537a831b4f235b1 100644
--- a/arch/arm/mach-imx/imx8m/soc.c
+++ b/arch/arm/mach-imx/imx8m/soc.c
@@ -217,6 +217,7 @@ u32 get_cpu_rev(void)
 					readl((void __iomem *)ROM_VERSION_A0);
 				if (rom_version != CHIP_REV_1_0) {
 					rom_version = readl((void __iomem *)ROM_VERSION_B0);
+					rom_version &= 0xff;
 					if (rom_version == CHIP_REV_2_0)
 						reg = CHIP_REV_2_0;
 				}