diff --git a/app/overlays/ptl/fpga_overlay.conf b/app/overlays/ptl/fpga_overlay.conf
new file mode 100644
index 000000000..1d09ecb6b
--- /dev/null
+++ b/app/overlays/ptl/fpga_overlay.conf
@@ -0,0 +1,3 @@
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=19200000
+CONFIG_DAI_DMIC_HW_IOCLK=19200000
+