diff --git a/samples/cellular/lwm2m_client/overlay-assist-agnss.conf b/samples/cellular/lwm2m_client/overlay-assist-agnss.conf
index 1f7d83ce7e76..53e1d1fddaeb 100644
--- a/samples/cellular/lwm2m_client/overlay-assist-agnss.conf
+++ b/samples/cellular/lwm2m_client/overlay-assist-agnss.conf
@@ -1,4 +1,4 @@
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
+CONFIG_PICOLIBC_IO_FLOAT=y
 #LwM2M Client utility library options
 CONFIG_LWM2M_CLIENT_UTILS_GNSS_ASSIST_OBJ_SUPPORT=y
 CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_AGNSS=y
diff --git a/samples/cellular/lwm2m_client/overlay-assist-cell.conf b/samples/cellular/lwm2m_client/overlay-assist-cell.conf
index c5151217b329..30d56c24513c 100644
--- a/samples/cellular/lwm2m_client/overlay-assist-cell.conf
+++ b/samples/cellular/lwm2m_client/overlay-assist-cell.conf
@@ -1,4 +1,4 @@
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
+CONFIG_PICOLIBC_IO_FLOAT=y
 #LwM2M Client utility library options
 CONFIG_LWM2M_CLIENT_UTILS_GROUND_FIX_OBJ_SUPPORT=y
 CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_CELL=y
diff --git a/samples/cellular/lwm2m_client/overlay-assist-pgps.conf b/samples/cellular/lwm2m_client/overlay-assist-pgps.conf
index 8298c3386a1e..156500058011 100644
--- a/samples/cellular/lwm2m_client/overlay-assist-pgps.conf
+++ b/samples/cellular/lwm2m_client/overlay-assist-pgps.conf
@@ -1,4 +1,4 @@
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
+CONFIG_PICOLIBC_IO_FLOAT=y
 #LwM2M Client utility library options
 CONFIG_LWM2M_CLIENT_UTILS_GNSS_ASSIST_OBJ_SUPPORT=y
 CONFIG_LWM2M_CLIENT_UTILS_LOCATION_ASSIST_PGPS=y
diff --git a/samples/cellular/lwm2m_client/overlay-assist-wifi.conf b/samples/cellular/lwm2m_client/overlay-assist-wifi.conf
index 54b981352c6a..7cf70d5d2a42 100644
--- a/samples/cellular/lwm2m_client/overlay-assist-wifi.conf
+++ b/samples/cellular/lwm2m_client/overlay-assist-wifi.conf
@@ -10,8 +10,7 @@
 CONFIG_NRF_MODEM_LIB_TRACE=n
 
 # System settings
-CONFIG_NEWLIB_LIBC=y
-CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
+CONFIG_PICOLIBC_IO_FLOAT=y
 
 # LwM2M Client utility library options
 CONFIG_LWM2M_CLIENT_UTILS_GROUND_FIX_OBJ_SUPPORT=y