diff --git a/FM.cpp b/FM.cpp
index 85f9fb5..4a2eb70 100644
--- a/FM.cpp
+++ b/FM.cpp
@@ -156,7 +156,7 @@ uint8_t CFM::setMisc(uint16_t timeout, uint8_t timeoutLevel, uint8_t ctcssFreque
   m_timeoutTone.setParams(timeoutLevel);
   m_blanking.setParams(maxDev, timeoutLevel);
 
-  uint8_t ret = m_ctcssRX.setParams(ctcssFrequency, ctcssThreshold, q15_t(rxLevel * 128));
+  uint8_t ret = m_ctcssRX.setParams(ctcssFrequency, ctcssThreshold, rxLevel);
   if (ret != 0U)
     return ret;
 
@@ -397,5 +397,3 @@ void CFM::beginRelaying()
   m_timeoutTimer.start();
   m_ackMinTimer.start();
 }
-
-
diff --git a/FMCTCSSRX.cpp b/FMCTCSSRX.cpp
index 180f1f3..00eebc6 100644
--- a/FMCTCSSRX.cpp
+++ b/FMCTCSSRX.cpp
@@ -91,10 +91,9 @@ m_rxLevelInverse(1)
 {
 }
 
-uint8_t CFMCTCSSRX::setParams(uint8_t frequency, uint8_t threshold, q15_t rxLevel)
+uint8_t CFMCTCSSRX::setParams(uint8_t frequency, uint8_t threshold, uint8_t level)
 {
-  // Calculate 1/rxLevel
-  m_rxLevelInverse = q31_t(q15Division(65535 /* This value should be 32767 (q15 1). But this does not work.*/, rxLevel));
+  m_rxLevelInverse = 255 / q15_t(level);
 
   m_coeffDivTwo = 0;
 
@@ -115,7 +114,7 @@ uint8_t CFMCTCSSRX::setParams(uint8_t frequency, uint8_t threshold, q15_t rxLeve
 
 CTCSSState CFMCTCSSRX::process(q15_t sample)
 {
-  q63_t sample31 = q31_t(sample) * m_rxLevelInverse;
+  q31_t sample31 = q31_t(sample) * m_rxLevelInverse;
 
   m_result = m_result & (~CTS_READY); 
 
diff --git a/FMCTCSSRX.h b/FMCTCSSRX.h
index 7f36b32..4c1dfc3 100644
--- a/FMCTCSSRX.h
+++ b/FMCTCSSRX.h
@@ -53,7 +53,7 @@ class CFMCTCSSRX {
 public:
   CFMCTCSSRX();
 
-  uint8_t setParams(uint8_t frequency, uint8_t threshold, q15_t rxLevel);
+  uint8_t setParams(uint8_t frequency, uint8_t threshold, uint8_t level);
   
   CTCSSState process(q15_t sample);
 
@@ -62,25 +62,13 @@ public:
   void reset();
 
 private:
-  static inline q15_t q15Division(q15_t a, q15_t divisor)
-  {
-    q31_t a31 = q31_t(a) << 16;
-
-    if (((a >> 31) & 1) == ((divisor >> 15) & 1))
-      a31 += divisor >> 1;
-    else
-      a31 -= divisor >> 1;
-
-    return a31 / divisor;
-  }
-
   q63_t      m_coeffDivTwo;
   q31_t      m_threshold;
   uint16_t   m_count;
   q31_t      m_q0;
   q31_t      m_q1;
   CTCSSState m_result;
-  q31_t m_rxLevelInverse;
+  q15_t      m_rxLevelInverse;
 };
 
 #endif
diff --git a/SerialPort.cpp b/SerialPort.cpp
index 7a6e609..da81dfd 100644
--- a/SerialPort.cpp
+++ b/SerialPort.cpp
@@ -101,7 +101,7 @@ const uint8_t MMDVM_DEBUG5       = 0xF5U;
 #define	HW_TYPE	"MMDVM"
 #endif
 
-#define DESCRIPTION "20200426 (D-Star/DMR/System Fusion/P25/NXDN/POCSAG/FM)"
+#define DESCRIPTION "20200427 (D-Star/DMR/System Fusion/P25/NXDN/POCSAG/FM)"
 
 #if defined(GITVERSION)
 #define concat(h, a, b, c) h " " a " " b " GitID #" c ""