diff --git a/plugins/channeltx/modais/aismodsource.cpp b/plugins/channeltx/modais/aismodsource.cpp
index 7207eec46..8d444fb0c 100644
--- a/plugins/channeltx/modais/aismodsource.cpp
+++ b/plugins/channeltx/modais/aismodsource.cpp
@@ -154,7 +154,7 @@ void AISModSource::sampleToScope(Complex sample)
 
 void AISModSource::modulateSample()
 {
-    Real mod;
+    Real mod = 0.0f;
     Real linearRampGain;
 
     if ((m_state == idle) || (m_state == wait))