diff --git a/src/opnmidi_midiplay.cpp b/src/opnmidi_midiplay.cpp
index f3e4f49..f2a76ab 100644
--- a/src/opnmidi_midiplay.cpp
+++ b/src/opnmidi_midiplay.cpp
@@ -1606,7 +1606,7 @@ size_t OPNMIDIplay::chooseDevice(const std::string &name)
     size_t n = m_midiDevices.size() * 16;
     m_midiDevices.insert(std::make_pair(name, n));
     m_midiChannels.resize(n + 16);
-    resetMIDIDefaults(n);
+    resetMIDIDefaults(static_cast<int>(n));
     return n;
 }
 
diff --git a/src/opnmidi_opn2.cpp b/src/opnmidi_opn2.cpp
index 26ef352..a58945c 100644
--- a/src/opnmidi_opn2.cpp
+++ b/src/opnmidi_opn2.cpp
@@ -400,7 +400,7 @@ void OPN2::touchNote(size_t c,
         if(volume > minVolume)
         {
             double lv = std::log(static_cast<double>(volume));
-            volume = static_cast<uint_fast32_t>(lv * c1 - c2) * 2.0;
+            volume = static_cast<uint_fast32_t>(lv * c1 - c2) * 2;
         }
         else
             volume = 0;