diff --git a/src/soc/mediatek/mt8192/dramc_pi_basic_api.c b/src/soc/mediatek/mt8192/dramc_pi_basic_api.c
index af1410bedf..996dff88ed 100644
--- a/src/soc/mediatek/mt8192/dramc_pi_basic_api.c
+++ b/src/soc/mediatek/mt8192/dramc_pi_basic_api.c
@@ -4,7 +4,6 @@
 #include <soc/dramc_pi_api.h>
 #include <soc/dramc_register.h>
 #include <soc/gpio.h>
-#include <string.h>
 #include <timer.h>
 
 static const u8 mrr_o1_pinmux_mapping[PINMUX_MAX][CHANNEL_MAX][DQ_DATA_WIDTH] = {
diff --git a/src/soc/mediatek/mt8192/dramc_pi_calibration_api.c b/src/soc/mediatek/mt8192/dramc_pi_calibration_api.c
index e4dc896829..5c6d94dbad 100644
--- a/src/soc/mediatek/mt8192/dramc_pi_calibration_api.c
+++ b/src/soc/mediatek/mt8192/dramc_pi_calibration_api.c
@@ -2,7 +2,6 @@
 
 #include <soc/dramc_pi_api.h>
 #include <soc/dramc_register.h>
-#include <string.h>
 
 static const u8 imp_vref_sel[ODT_MAX][IMP_DRV_MAX] = {
 	/* DRVP  DRVN  ODTP  ODTN */
diff --git a/src/soc/mediatek/mt8192/pmif.c b/src/soc/mediatek/mt8192/pmif.c
index 57fc9d4a3f..a7ab4e5fa5 100644
--- a/src/soc/mediatek/mt8192/pmif.c
+++ b/src/soc/mediatek/mt8192/pmif.c
@@ -9,7 +9,6 @@
 #include <soc/pmif_spmi.h>
 #include <soc/pmif_sw.h>
 #include <soc/spmi.h>
-#include <string.h>
 #include <timer.h>
 
 static int pmif_check_swinf(struct pmif *arb, long timeout_us, u32 expected_status)
diff --git a/src/soc/mediatek/mt8192/pmif_spmi.c b/src/soc/mediatek/mt8192/pmif_spmi.c
index 87b003bd3f..f30e965780 100644
--- a/src/soc/mediatek/mt8192/pmif_spmi.c
+++ b/src/soc/mediatek/mt8192/pmif_spmi.c
@@ -9,7 +9,6 @@
 #include <soc/pmif_spmi.h>
 #include <soc/pmif_sw.h>
 #include <soc/spmi.h>
-#include <string.h>
 
 #define PMIF_CMD_PER_3	(0x1 << PMIF_CMD_EXT_REG_LONG)
 #define PMIF_CMD_PER_1_3	((0x1 << PMIF_CMD_REG) | (0x1 << PMIF_CMD_EXT_REG_LONG))