diff --git a/configs/z16f2800100zcog/ostest/defconfig b/configs/z16f2800100zcog/ostest/defconfig
index ebb0cee8ebf..8ef26c93837 100644
--- a/configs/z16f2800100zcog/ostest/defconfig
+++ b/configs/z16f2800100zcog/ostest/defconfig
@@ -52,6 +52,7 @@
 #   the board that supports the particular chip or SoC.
 # CONFIG_ARCH_BOARD_name - for use in C code
 # CONFIG_BOARD_LOOPSPERMSEC - for delay loops
+# CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
 # CONFIG_DRAM_SIZE - Describes the installed DRAM.
 # CONFIG_ARCH_LEDS -  Use LEDs to show state. Unique to z16f.
 #
@@ -66,6 +67,7 @@ CONFIG_ARCH_CHIP_Z16F6411=n
 CONFIG_ARCH_BOARD=z16f2800100zcog
 CONFIG_ARCH_BOARD_Z16F2800100ZCOG=y
 CONFIG_BOARD_LOOPSPERMSEC=1250
+CONFIG_ENDIAN_BIG=y
 CONFIG_DRAM_SIZE=65536
 CONFIG_ARCH_LEDS=y
 #
diff --git a/configs/z16f2800100zcog/pashello/defconfig b/configs/z16f2800100zcog/pashello/defconfig
index 9b2ae194537..ef17f420671 100644
--- a/configs/z16f2800100zcog/pashello/defconfig
+++ b/configs/z16f2800100zcog/pashello/defconfig
@@ -52,6 +52,7 @@
 #   the board that supports the particular chip or SoC.
 # CONFIG_ARCH_BOARD_name - for use in C code
 # CONFIG_BOARD_LOOPSPERMSEC - for delay loops
+# CONFIG_ENDIAN_BIG - define if big endian (default is little endian)
 # CONFIG_DRAM_SIZE - Describes the installed DRAM.
 # CONFIG_ARCH_LEDS -  Use LEDs to show state. Unique to z16f.
 #
@@ -66,6 +67,7 @@ CONFIG_ARCH_CHIP_Z16F6411=n
 CONFIG_ARCH_BOARD=z16f2800100zcog
 CONFIG_ARCH_BOARD_Z16F2800100ZCOG=y
 CONFIG_BOARD_LOOPSPERMSEC=1250
+CONFIG_ENDIAN_BIG=y
 CONFIG_DRAM_SIZE=65536
 CONFIG_ARCH_LEDS=y
 #