diff --git a/TNC/Afsk1200Demodulator.cpp b/TNC/Afsk1200Demodulator.cpp
index 2d4277d..a277063 100644
--- a/TNC/Afsk1200Demodulator.cpp
+++ b/TNC/Afsk1200Demodulator.cpp
@@ -198,9 +198,9 @@ uint32_t Afsk1200Demodulator::readBatteryLevel()
 
     // Order of operations is important to avoid underflow.
     vbat *= 6600;
-    vbat /= (vrefint + 1);
+    vbat /= (VREF + 1);
 
-    uint32_t vref = (vrefint * 3300) + (VREF / 2) / VREF;
+    uint32_t vref = ((vrefint * 3300) + (VREF / 2)) / VREF;
 
     INFO("Vref = %lumV", vref)
     INFO("Vbat = %lumV", vbat);
diff --git a/TNC/Fsk9600Demodulator.cpp b/TNC/Fsk9600Demodulator.cpp
index e15cd2b..18e198a 100644
--- a/TNC/Fsk9600Demodulator.cpp
+++ b/TNC/Fsk9600Demodulator.cpp
@@ -158,9 +158,9 @@ uint32_t Fsk9600Demodulator::readBatteryLevel()
 
     // Order of operations is important to avoid underflow.
     vbat *= 6600;
-    vbat /= (vrefint + 1);
+    vbat /= (VREF + 1);
 
-    uint32_t vref = (vrefint * 3300) + (VREF / 2) / VREF;
+    uint32_t vref = ((vrefint * 3300) + (VREF / 2)) / VREF;
 
     INFO("Vref = %lumV", vref)
     INFO("Vbat = %lumV", vbat);
diff --git a/TNC/Fsk9600Demodulator.hpp b/TNC/Fsk9600Demodulator.hpp
index 2283cc6..4a57f5d 100644
--- a/TNC/Fsk9600Demodulator.hpp
+++ b/TNC/Fsk9600Demodulator.hpp
@@ -32,7 +32,7 @@ struct Fsk9600Demodulator : IDemodulator
     static_assert(audio::ADC_BUFFER_SIZE >= ADC_BLOCK_SIZE);
 
     static constexpr uint32_t SAMPLE_RATE = 192000;
-    static constexpr uint16_t VREF = 16383;
+    static constexpr uint16_t VREF = 4095;
 
     using bpf_coeffs_type = std::array<int16_t, FILTER_TAP_NUM>;
     using bpf_bank_type = std::array<bpf_coeffs_type, 13>;