diff --git a/src/API/baseTimer.h b/src/API/baseTimer.h
index 45b8eaa..1f0c82a 100644
--- a/src/API/baseTimer.h
+++ b/src/API/baseTimer.h
@@ -21,7 +21,7 @@ namespace TeensyTimerTool
      public:
         template <typename period_t>
         inline errorCode begin(callback_t callback, period_t period, bool start = true);
-        inline errorCode setPrescaler(int psc);
+        errorCode setPrescaler(int psc);
         inline errorCode end();
         inline errorCode start();
         inline errorCode stop();
@@ -112,4 +112,4 @@ namespace TeensyTimerTool
         postError(errorCode::notInitialized);
         return NAN;
     }
-} // namespace TeensyTimerTool
\ No newline at end of file
+} // namespace TeensyTimerTool