diff --git a/lib/Sine.cpp b/lib/Sine.cpp
index 31e8a62..7fd842f 100644
--- a/lib/Sine.cpp
+++ b/lib/Sine.cpp
@@ -42,6 +42,8 @@ namespace muz
         m_phases[i] += 2 * M_PI * m_out_freq[i]
           / static_cast<float>(m_conf.samplerate());
 
+        m_phases[i] = std::fmod(m_phases[i], 2.0f * M_PI);
+
         out[i] = value;
       }
   }