diff --git a/audio/audio_mixer.c b/audio/audio_mixer.c
index c781297..0984fc2 100644
--- a/audio/audio_mixer.c
+++ b/audio/audio_mixer.c
@@ -667,7 +667,7 @@ static void audio_mixer_mix_ogg(float* buffer, size_t num_frames,
    int i;
    struct resampler_data info;
    float temp_buffer[AUDIO_MIXER_TEMP_OGG_BUFFER];
-   unsigned buf_free                = num_frames * 2;
+   unsigned buf_free                = (unsigned)(num_frames * 2);
    unsigned temp_samples            = 0;
    float* pcm                       = NULL;
 
@@ -740,7 +740,7 @@ static void audio_mixer_mix_mod(float* buffer, size_t num_frames,
    float samplef                    = 0.0f;
    int samplei                      = 0;
    unsigned temp_samples            = 0;
-   unsigned buf_free                = num_frames * 2;
+   unsigned buf_free                = (unsigned)(num_frames * 2);
    int* pcm                         = NULL;
 
    if (voice->types.mod.position == voice->types.mod.samples)
diff --git a/formats/libchdr/chd.c b/formats/libchdr/chd.c
index 78cac09..be35961 100644
--- a/formats/libchdr/chd.c
+++ b/formats/libchdr/chd.c
@@ -405,9 +405,10 @@ void *lzma_fast_alloc(void *p, size_t size)
 	}
 
 	/* alloc a new one and put it into the list */
-	addr = (uint32_t *)malloc(sizeof(uint8_t) * (size + sizeof(uint32_t)));
-	if (addr==NULL)
+	addr = (uint32_t *)malloc(sizeof(uint32_t) * (size + sizeof(uint32_t)));
+	if (!addr)
 		return NULL;
+    
 	for (scan = 0; scan < MAX_LZMA_ALLOCS; scan++)
 	{
 		if (codec->allocptr[scan] == NULL)
diff --git a/streams/file_stream.c b/streams/file_stream.c
index 988ba73..aa3bda1 100644
--- a/streams/file_stream.c
+++ b/streams/file_stream.c
@@ -320,14 +320,14 @@ int filestream_putc(RFILE *stream, int c)
 int filestream_vprintf(RFILE *stream, const char* format, va_list args)
 {
    static char buffer[8 * 1024];
-   int num_chars = vsprintf(buffer, format, args);
+   int64_t num_chars = vsprintf(buffer, format, args);
 
    if (num_chars < 0)
       return -1;
    else if (num_chars == 0)
       return 0;
 
-   return filestream_write(stream, buffer, num_chars);
+   return (int)filestream_write(stream, buffer, num_chars);
 }
 
 int filestream_printf(RFILE *stream, const char* format, ...)
diff --git a/streams/file_stream_transforms.c b/streams/file_stream_transforms.c
index 8796073..143db89 100644
--- a/streams/file_stream_transforms.c
+++ b/streams/file_stream_transforms.c
@@ -93,7 +93,7 @@ int rfseek(RFILE* stream, long offset, int origin)
          break;
    }
 
-   return filestream_seek(stream, offset, seek_position);
+   return (int)filestream_seek(stream, (ssize_t)offset, seek_position);
 }
 
 size_t rfread(void* buffer,
diff --git a/streams/interface_stream.c b/streams/interface_stream.c
index c61d122..a219a15 100644
--- a/streams/interface_stream.c
+++ b/streams/interface_stream.c
@@ -435,7 +435,7 @@ intfstream_t *intfstream_open_memory(void *data,
 
    info.type            = INTFSTREAM_MEMORY;
    info.memory.buf.data = (uint8_t*)data;
-   info.memory.buf.size = size;
+   info.memory.buf.size = (unsigned)size;
    info.memory.writable = false;
 
    fd                   = (intfstream_t*)intfstream_init(&info);
diff --git a/string/stdstring.c b/string/stdstring.c
index 02f8dad..f864cea 100644
--- a/string/stdstring.c
+++ b/string/stdstring.c
@@ -169,7 +169,7 @@ char *word_wrap(char* buffer, const char *string, int line_width, bool unicode)
          }
 
          character = utf8skip(&string[i], 1);
-         char_len = character - &string[i];
+         char_len  = (unsigned)(character - &string[i]);
 
          if (!unicode)
             counter += char_len - 1;