diff --git a/brotli/dec/decode.c b/brotli/dec/decode.c
index ed9ef86..f7ae1df 100644
--- a/brotli/dec/decode.c
+++ b/brotli/dec/decode.c
@@ -651,9 +651,9 @@
 
   // Decode window size.
   window_bits = DecodeWindowBits(&br);
-  max_backward_distance = (1 << window_bits) - 16;
+  max_backward_distance = (1ULL << window_bits) - 16;
 
-  ringbuffer_size = 1 << window_bits;
+  ringbuffer_size = 1ULL << window_bits;
   ringbuffer_mask = ringbuffer_size - 1;
   ringbuffer = (uint8_t*)malloc(ringbuffer_size +
                                 kRingBufferWriteAheadSlack +
diff --git a/brotli/dec/streams.c b/brotli/dec/streams.c
index 2a34773..89e030a 100644
--- a/brotli/dec/streams.c
+++ b/brotli/dec/streams.c
@@ -34,7 +34,7 @@
   }
   memcpy(buf, input->buffer + input->pos, count);
   input->pos += count;
-  return count;
+  return (int)count;
 }
 
 BrotliInput BrotliInitMemInput(const uint8_t* buffer, size_t length,
@@ -55,7 +55,7 @@
   }
   memcpy(output->buffer + output->pos, buf, count);
   output->pos += count;
-  return count;
+  return (int)count;
 }
 
 BrotliOutput BrotliInitMemOutput(uint8_t* buffer, size_t length,
@@ -100,7 +100,7 @@
 }
 
 int BrotliFileOutputFunction(void* data, const uint8_t* buf, size_t count) {
-  return fwrite(buf, 1, count, (FILE*)data);
+  return (int)fwrite(buf, 1, count, (FILE*)data);
 }
 
 BrotliOutput BrotliFileOutput(FILE* f) {