diff --git a/configs/clearfog_defconfig b/configs/clearfog_defconfig
index 9167a9450d..2e59686291 100644
--- a/configs/clearfog_defconfig
+++ b/configs/clearfog_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
 CONFIG_ARCH_MVEBU=y
 CONFIG_SYS_TEXT_BASE=0x00800000
 CONFIG_SPL_GPIO_SUPPORT=y
diff --git a/configs/corvus_defconfig b/configs/corvus_defconfig
index b1e7c35fa9..a1af2f1342 100644
--- a/configs/corvus_defconfig
+++ b/configs/corvus_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
 # CONFIG_SPL_USE_ARCH_MEMCPY is not set
 # CONFIG_SPL_USE_ARCH_MEMSET is not set
 CONFIG_ARCH_AT91=y
diff --git a/configs/picosam9g45_defconfig b/configs/picosam9g45_defconfig
index 0b6234fbd9..df979f9326 100644
--- a/configs/picosam9g45_defconfig
+++ b/configs/picosam9g45_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
 CONFIG_ARCH_AT91=y
 CONFIG_SYS_TEXT_BASE=0x23f00000
 CONFIG_TARGET_PICOSAM9G45=y
diff --git a/configs/wb45n_defconfig b/configs/wb45n_defconfig
index 33591d73e0..9d881e5d41 100644
--- a/configs/wb45n_defconfig
+++ b/configs/wb45n_defconfig
@@ -1,4 +1,5 @@
 CONFIG_ARM=y
+CONFIG_SYS_THUMB_BUILD=y
 CONFIG_ARCH_AT91=y
 CONFIG_SYS_TEXT_BASE=0x23f00000
 CONFIG_TARGET_WB45N=y