diff --git a/samples/zephyr/c_interop/platforms/stm32f4_disco.def b/samples/zephyr/c_interop/platforms/stm32f4_disco.def
index 1eb0decf5d6..461af256e6f 100644
--- a/samples/zephyr/c_interop/platforms/stm32f4_disco.def
+++ b/samples/zephyr/c_interop/platforms/stm32f4_disco.def
@@ -18,13 +18,3 @@
 headers = autoconf.h zephyr.h board.h device.h gpio.h
 compilerOpts = -DKERNEL -DUSE_FULL_LL_DRIVER -DUSE_HAL_DRIVER -D_FORTIFY_SOURCE=2 -D__ZEPHYR__=1 -ffreestanding -std=c99 -nostdinc
 
----
-
-// cinterop doesn't support `#define FOO "string"` constructs as of yet.
-// so we provide this accessor for now. Because the port names
-// are resolved to string literals.
-
-extern const char* led0_gpio_port(void) {
-     return LED0_GPIO_PORT;
-}
-
diff --git a/samples/zephyr/src/main.kt b/samples/zephyr/src/main.kt
index f335cdf5ac8..5a21aa74141 100644
--- a/samples/zephyr/src/main.kt
+++ b/samples/zephyr/src/main.kt
@@ -19,8 +19,7 @@ import kotlinx.cinterop.*
 
 fun blinky(value: Int) {
 
-    // See the .def file for details of led0_gpio_port()
-    val port = led0_gpio_port()!!.toKString()
+    val port = LED0_GPIO_PORT
     val led = LED0_GPIO_PIN
     var toggler = false
     val dev = device_get_binding(port)