diff --git a/library.json b/library.json
index 05ffaee..918e264 100644
--- a/library.json
+++ b/library.json
@@ -16,7 +16,7 @@
     "url": "https://github.com/ardnew/cronos.git"
   },
   "license": "MIT",
-  "version": "0.1.5",
+  "version": "0.1.6",
   "headers": [
     "cronos.hpp"
   ],
diff --git a/library.properties b/library.properties
index 21e8b98..24070eb 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=cronos
-version=0.1.5
+version=0.1.6
 author=ardnew
 maintainer=ardnew (andrew@ardnew.com)
 sentence=A std::chrono wrapper for target system's native tick count.
diff --git a/src/cronos.hpp b/src/cronos.hpp
index afbaae9..e3b8c89 100644
--- a/src/cronos.hpp
+++ b/src/cronos.hpp
@@ -5,12 +5,18 @@
 #include <functional>
 #include <iostream>
 
+#if defined(ESP_PLATFORM)
+#include <esp_timer.h>
+#elif defined(ARDUINO)
+#include <Arduino.h>
+#endif
+
 namespace native {
 class ticker {
  public:
 #if defined(ESP_PLATFORM)
-#include <esp_timer.h>  // ESP32 (FreeRTOS) ticks are in microseconds.
 #define fastcode IRAM_ATTR /* __attribute__((section(".iram1.text"))) */
+  // ESP32 (FreeRTOS) ticks are in microseconds.
   static constexpr auto fastcode count = esp_timer_get_time;
   using period = std::micro;
 
@@ -18,8 +24,8 @@ class ticker {
   // It's likely there are many generic platforms that will have ARDUINO
   // defined. So be sure to check it last (but before the default C++
   // implementation).
-#include <Arduino.h>  // Arduino ticks are in milliseconds.
 #define fastcode
+  // Arduino ticks are in milliseconds.
   static constexpr auto fastcode count = millis;
   using period = std::milli;