diff --git a/samples/bluetooth/peripheral_hr/boards/frdm_k64f.conf b/samples/bluetooth/peripheral_hr/boards/frdm_k64f.conf
new file mode 100644
index 00000000000000..5858c7b6db1b38
--- /dev/null
+++ b/samples/bluetooth/peripheral_hr/boards/frdm_k64f.conf
@@ -0,0 +1 @@
+CONFIG_ENTROPY_GENERATOR=y
diff --git a/samples/bluetooth/peripheral_ht/boards/frdm_k64f.conf b/samples/bluetooth/peripheral_ht/boards/frdm_k64f.conf
new file mode 100644
index 00000000000000..5858c7b6db1b38
--- /dev/null
+++ b/samples/bluetooth/peripheral_ht/boards/frdm_k64f.conf
@@ -0,0 +1 @@
+CONFIG_ENTROPY_GENERATOR=y