diff --git a/examples/zephyr/device-dashboard/prj.conf b/examples/zephyr/device-dashboard/prj.conf
index 4441e088..eb00db9e 100644
--- a/examples/zephyr/device-dashboard/prj.conf
+++ b/examples/zephyr/device-dashboard/prj.conf
@@ -18,5 +18,6 @@ CONFIG_ISR_STACK_SIZE=2048
 CONFIG_MAIN_STACK_SIZE=8192
 CONFIG_IDLE_STACK_SIZE=1024
 
+CONFIG_MINIMAL_LIBC=y
 CONFIG_MINIMAL_LIBC_RAND=y
 CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE=32768
diff --git a/examples/zephyr/http-client/prj.conf b/examples/zephyr/http-client/prj.conf
index d4199066..aa8f4b45 100644
--- a/examples/zephyr/http-client/prj.conf
+++ b/examples/zephyr/http-client/prj.conf
@@ -23,6 +23,7 @@ CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED=y
 CONFIG_MBEDTLS_ECP_ALL_ENABLED=y
 CONFIG_MBEDTLS_TLS_VERSION_1_2=y
 
+CONFIG_MINIMAL_LIBC=y
 CONFIG_MINIMAL_LIBC_RAND=y
 CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE=131072
 
diff --git a/examples/zephyr/http-server/prj.conf b/examples/zephyr/http-server/prj.conf
index 6cf72742..d4ab7caa 100644
--- a/examples/zephyr/http-server/prj.conf
+++ b/examples/zephyr/http-server/prj.conf
@@ -22,5 +22,6 @@ CONFIG_MBEDTLS_PEM_CERTIFICATE_FORMAT=y
 CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED=y
 CONFIG_MBEDTLS_ECP_ALL_ENABLED=y
 
+CONFIG_MINIMAL_LIBC=y
 CONFIG_MINIMAL_LIBC_RAND=y
 CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE=32756
diff --git a/examples/zephyr/mqtt-aws-client/prj.conf b/examples/zephyr/mqtt-aws-client/prj.conf
index 1c530a00..d75a5aca 100644
--- a/examples/zephyr/mqtt-aws-client/prj.conf
+++ b/examples/zephyr/mqtt-aws-client/prj.conf
@@ -23,6 +23,7 @@ CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED=y
 CONFIG_MBEDTLS_ECP_ALL_ENABLED=y
 CONFIG_MBEDTLS_TLS_VERSION_1_2=y
 
+CONFIG_MINIMAL_LIBC=y
 CONFIG_MINIMAL_LIBC_RAND=y
 CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE=131072
 
diff --git a/examples/zephyr/websocket-server/prj.conf b/examples/zephyr/websocket-server/prj.conf
index 6cf72742..d4ab7caa 100644
--- a/examples/zephyr/websocket-server/prj.conf
+++ b/examples/zephyr/websocket-server/prj.conf
@@ -22,5 +22,6 @@ CONFIG_MBEDTLS_PEM_CERTIFICATE_FORMAT=y
 CONFIG_MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED=y
 CONFIG_MBEDTLS_ECP_ALL_ENABLED=y
 
+CONFIG_MINIMAL_LIBC=y
 CONFIG_MINIMAL_LIBC_RAND=y
 CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE=32756