diff --git a/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp b/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp
index fe680cbab8..a06087e815 100644
--- a/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp
+++ b/modules/juce_audio_formats/codecs/juce_FlacAudioFormat.cpp
@@ -250,7 +250,7 @@ public:
                     samplesInReservoir = 0;
                 }
                 else if (startSampleInFile < reservoirStart
-                          || startSampleInFile > reservoirStart + jmax (samplesInReservoir, 511))
+                          || startSampleInFile > reservoirStart + jmax (samplesInReservoir, (int64) 511))
                 {
                     // had some problems with flac crashing if the read pos is aligned more
                     // accurately than this. Probably fixed in newer versions of the library, though.
@@ -367,7 +367,7 @@ public:
 private:
     FlacNamespace::FLAC__StreamDecoder* decoder;
     AudioBuffer<float> reservoir;
-    int reservoirStart = 0, samplesInReservoir = 0;
+    int64 reservoirStart = 0, samplesInReservoir = 0;
     bool ok = false, scanningForLength = false;
 
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (FlacReader)
diff --git a/modules/juce_audio_formats/codecs/juce_OggVorbisAudioFormat.cpp b/modules/juce_audio_formats/codecs/juce_OggVorbisAudioFormat.cpp
index 5649ccd5de..d2410edfc7 100644
--- a/modules/juce_audio_formats/codecs/juce_OggVorbisAudioFormat.cpp
+++ b/modules/juce_audio_formats/codecs/juce_OggVorbisAudioFormat.cpp
@@ -160,13 +160,13 @@ public:
     {
         while (numSamples > 0)
         {
-            auto numAvailable = (int) (reservoirStart + samplesInReservoir - startSampleInFile);
+            auto numAvailable = (reservoirStart + samplesInReservoir - startSampleInFile);
 
             if (startSampleInFile >= reservoirStart && numAvailable > 0)
             {
                 // got a few samples overlapping, so use them before seeking..
 
-                auto numToUse = jmin (numSamples, numAvailable);
+                auto numToUse = jmin ((int64) numSamples, numAvailable);
 
                 for (int i = jmin (numDestChannels, reservoir.getNumChannels()); --i >= 0;)
                     if (destSamples[i] != nullptr)
@@ -175,8 +175,8 @@ public:
                                 (size_t) numToUse * sizeof (float));
 
                 startSampleInFile += numToUse;
-                numSamples -= numToUse;
-                startOffsetInDestBuffer += numToUse;
+                numSamples -= (int) numToUse;
+                startOffsetInDestBuffer += (int) numToUse;
 
                 if (numSamples == 0)
                     break;
@@ -194,7 +194,7 @@ public:
 
                 int bitStream = 0;
                 int offset = 0;
-                int numToRead = samplesInReservoir;
+                int numToRead = (int) samplesInReservoir;
 
                 while (numToRead > 0)
                 {
@@ -261,7 +261,7 @@ private:
     OggVorbisNamespace::OggVorbis_File ovFile;
     OggVorbisNamespace::ov_callbacks callbacks;
     AudioBuffer<float> reservoir;
-    int reservoirStart = 0, samplesInReservoir = 0;
+    int64 reservoirStart = 0, samplesInReservoir = 0;
 
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (OggReader)
 };