diff --git a/src/acpi/soundwire.c b/src/acpi/soundwire.c
index 1151a181c1..ed3634de62 100644
--- a/src/acpi/soundwire.c
+++ b/src/acpi/soundwire.c
@@ -7,7 +7,6 @@
 #include <device/soundwire.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <string.h>
 
 /* Specification-defined prefix for SoundWire properties. */
 #define SDW_PFX "mipi-sdw-"
diff --git a/src/mainboard/dell/optiplex_9010/sch5545_ec.c b/src/mainboard/dell/optiplex_9010/sch5545_ec.c
index 401345254d..2719460a9e 100644
--- a/src/mainboard/dell/optiplex_9010/sch5545_ec.c
+++ b/src/mainboard/dell/optiplex_9010/sch5545_ec.c
@@ -2,7 +2,6 @@
 
 #include <cbfs.h>
 #include <cf9_reset.h>
-#include <string.h>
 #include <option.h>
 #include <arch/io.h>
 #include <cpu/x86/msr.h>
diff --git a/src/mainboard/emulation/qemu-q35/acpi_tables.c b/src/mainboard/emulation/qemu-q35/acpi_tables.c
index 51baae5135..104e5d0883 100644
--- a/src/mainboard/emulation/qemu-q35/acpi_tables.c
+++ b/src/mainboard/emulation/qemu-q35/acpi_tables.c
@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <types.h>
-#include <string.h>
 #include <acpi/acpi.h>
 #include <acpi/acpi_gnvs.h>
 #include <arch/ioapic.h>
diff --git a/src/southbridge/amd/agesa/hudson/fadt.c b/src/southbridge/amd/agesa/hudson/fadt.c
index bb86d5f174..e3b16477a4 100644
--- a/src/southbridge/amd/agesa/hudson/fadt.c
+++ b/src/southbridge/amd/agesa/hudson/fadt.c
@@ -4,7 +4,6 @@
  * ACPI - create the Fixed ACPI Description Tables (FADT)
  */
 
-#include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
 #include <device/device.h>
diff --git a/src/southbridge/amd/cimx/sb800/fadt.c b/src/southbridge/amd/cimx/sb800/fadt.c
index 4bca1364be..379205ab9d 100644
--- a/src/southbridge/amd/cimx/sb800/fadt.c
+++ b/src/southbridge/amd/cimx/sb800/fadt.c
@@ -5,8 +5,6 @@
  * ACPI - create the Fixed ACPI Description Tables (FADT)
  */
 
-
-#include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
 #include <arch/io.h>
diff --git a/src/southbridge/amd/pi/hudson/fadt.c b/src/southbridge/amd/pi/hudson/fadt.c
index a243252c21..a8bc9c2cdc 100644
--- a/src/southbridge/amd/pi/hudson/fadt.c
+++ b/src/southbridge/amd/pi/hudson/fadt.c
@@ -4,7 +4,6 @@
  * ACPI - create the Fixed ACPI Description Tables (FADT)
  */
 
-#include <string.h>
 #include <console/console.h>
 #include <acpi/acpi.h>
 #include <device/device.h>
diff --git a/src/southbridge/intel/i82371eb/fadt.c b/src/southbridge/intel/i82371eb/fadt.c
index 84745a4a7a..5086992ab0 100644
--- a/src/southbridge/intel/i82371eb/fadt.c
+++ b/src/southbridge/intel/i82371eb/fadt.c
@@ -4,7 +4,6 @@
  * Based on src/southbridge/via/vt8237r/vt8237_fadt.c
  */
 
-#include <string.h>
 #include <acpi/acpi.h>
 #include <device/device.h>
 #include <device/pci.h>
diff --git a/src/southbridge/intel/i82801dx/fadt.c b/src/southbridge/intel/i82801dx/fadt.c
index 2da2175f01..4d1a615aca 100644
--- a/src/southbridge/intel/i82801dx/fadt.c
+++ b/src/southbridge/intel/i82801dx/fadt.c
@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <version.h>
diff --git a/src/southbridge/intel/i82801gx/fadt.c b/src/southbridge/intel/i82801gx/fadt.c
index dca4bb48c3..3ab491127b 100644
--- a/src/southbridge/intel/i82801gx/fadt.c
+++ b/src/southbridge/intel/i82801gx/fadt.c
@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <cpu/x86/smm.h>
diff --git a/src/southbridge/intel/i82801ix/fadt.c b/src/southbridge/intel/i82801ix/fadt.c
index 7a3840810c..3b657ad126 100644
--- a/src/southbridge/intel/i82801ix/fadt.c
+++ b/src/southbridge/intel/i82801ix/fadt.c
@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <cpu/x86/smm.h>
diff --git a/src/southbridge/intel/i82801jx/fadt.c b/src/southbridge/intel/i82801jx/fadt.c
index c0a9d53b04..c00aa74b9f 100644
--- a/src/southbridge/intel/i82801jx/fadt.c
+++ b/src/southbridge/intel/i82801jx/fadt.c
@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#include <string.h>
 #include <device/pci_ops.h>
 #include <acpi/acpi.h>
 #include <cpu/x86/smm.h>