diff --git a/samples/blinky_arduino/prj.conf b/samples/blinky_arduino/prj.conf
index 100a4977..290d61a3 100644
--- a/samples/blinky_arduino/prj.conf
+++ b/samples/blinky_arduino/prj.conf
@@ -1,3 +1,2 @@
 CONFIG_GPIO=y
-CONFIG_CPLUSPLUS=y
-CONFIG_ARDUINO_API=y
\ No newline at end of file
+CONFIG_ARDUINO_API=y
diff --git a/samples/button_press_led/prj.conf b/samples/button_press_led/prj.conf
index 100a4977..290d61a3 100644
--- a/samples/button_press_led/prj.conf
+++ b/samples/button_press_led/prj.conf
@@ -1,3 +1,2 @@
 CONFIG_GPIO=y
-CONFIG_CPLUSPLUS=y
-CONFIG_ARDUINO_API=y
\ No newline at end of file
+CONFIG_ARDUINO_API=y
diff --git a/samples/hello_arduino/prj.conf b/samples/hello_arduino/prj.conf
index df5e26f7..f93fa321 100644
--- a/samples/hello_arduino/prj.conf
+++ b/samples/hello_arduino/prj.conf
@@ -1,2 +1 @@
-CONFIG_CPLUSPLUS=y
-CONFIG_ARDUINO_API=y
\ No newline at end of file
+CONFIG_ARDUINO_API=y
diff --git a/samples/i2cdemo/prj.conf b/samples/i2cdemo/prj.conf
index ba2e427a..d546d036 100644
--- a/samples/i2cdemo/prj.conf
+++ b/samples/i2cdemo/prj.conf
@@ -1,7 +1,6 @@
 CONFIG_GPIO=y
-CONFIG_CPLUSPLUS=y
 CONFIG_ARDUINO_API=y
 CONFIG_I2C=y
 CONFIG_NEWLIB_LIBC=y
 CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
-CONFIG_RING_BUFFER=y
\ No newline at end of file
+CONFIG_RING_BUFFER=y
diff --git a/samples/threads_arduino/prj.conf b/samples/threads_arduino/prj.conf
index d391af74..2d0830d4 100644
--- a/samples/threads_arduino/prj.conf
+++ b/samples/threads_arduino/prj.conf
@@ -1,4 +1,3 @@
 CONFIG_HEAP_MEM_POOL_SIZE=256
 CONFIG_GPIO=y
-CONFIG_CPLUSPLUS=y
-CONFIG_ARDUINO_API=y
\ No newline at end of file
+CONFIG_ARDUINO_API=y