diff --git a/IOTeensy.cpp b/IOTeensy.cpp
index bfd419c..7572ccd 100644
--- a/IOTeensy.cpp
+++ b/IOTeensy.cpp
@@ -131,9 +131,7 @@ void CIO::startInt()
   LPTMR0_CSR  = 0;                                                    // Disable
   LPTMR0_PSR  = LPTMR_PSR_PBYP;                                       // Bypass prescaler/filter
   LPTMR0_CMR  = EXTERNAL_OSC / 24000;
-  LPTMR0_CSR  = LPTMR_CSR_TIE |                                       // Interrupt Enable
-                LPTMR_CSR_TPS(2) |                                    // Pin: 0=CMP0, 1=xtal, 2=pin13
-                LPTMR_CSR_TFC |                                       // Free-Running Counter
+  LPTMR0_CSR  = LPTMR_CSR_TPS(2) |                                    // Pin: 0=CMP0, 1=xtal, 2=pin13
                 LPTMR_CSR_TMS;                                        // Mode Select, 0=timer, 1=counter
   LPTMR0_CSR |= LPTMR_CSR_TEN;                                        // Enable
 #else