diff --git a/src/cpu/amd/pi/00730F01/update_microcode.c b/src/cpu/amd/pi/00730F01/update_microcode.c
index ccf64684aa..8942f0146a 100644
--- a/src/cpu/amd/pi/00730F01/update_microcode.c
+++ b/src/cpu/amd/pi/00730F01/update_microcode.c
@@ -78,7 +78,7 @@ static void apply_microcode_patch(const struct microcode *m)
 	printk(BIOS_DEBUG, "microcode: patch id to apply = 0x%08x\n",
 		m->patch_id);
 
-	msr = rdmsr(MSR_PATCH_LEVEL);
+	msr = rdmsr(IA32_BIOS_SIGN_ID);
 	new_patch_id = msr.lo;
 
 	if (new_patch_id == m->patch_id)
diff --git a/src/include/cpu/amd/msr.h b/src/include/cpu/amd/msr.h
index 55a7841e7e..37372d1662 100644
--- a/src/include/cpu/amd/msr.h
+++ b/src/include/cpu/amd/msr.h
@@ -80,7 +80,6 @@
 #define S3_RESUME_EIP_MSR		0xC00110E0
 #define PSP_ADDR_MSR			0xc00110a2
 
-#define MSR_PATCH_LEVEL			0x0000008B
 #define CORE_PERF_BOOST_CTRL		0x15c
 
 #endif /* CPU_AMD_MSR_H */
diff --git a/src/soc/amd/common/block/cpu/update_microcode.c b/src/soc/amd/common/block/cpu/update_microcode.c
index 2822d2f355..6d910e7d82 100644
--- a/src/soc/amd/common/block/cpu/update_microcode.c
+++ b/src/soc/amd/common/block/cpu/update_microcode.c
@@ -49,7 +49,7 @@ static void apply_microcode_patch(const struct microcode *m)
 	printk(BIOS_DEBUG, "microcode: patch id to apply = 0x%08x\n",
 		m->patch_id);
 
-	msr = rdmsr(MSR_PATCH_LEVEL);
+	msr = rdmsr(IA32_BIOS_SIGN_ID);
 	new_patch_id = msr.lo;
 
 	if (new_patch_id == m->patch_id)