diff --git a/libretro-common/formats/png/rpng.c b/libretro-common/formats/png/rpng.c
index 2517489581..09287d54fd 100644
--- a/libretro-common/formats/png/rpng.c
+++ b/libretro-common/formats/png/rpng.c
@@ -1048,7 +1048,7 @@ bool rpng_load_image_argb(const char *path, uint32_t **data,
    bool ret = true;
    rpng_t *rpng = NULL;
    void *ptr = NULL;
-   struct nbio_t* handle = (void*)nbio_open(path, NBIO_READ);
+   struct nbio_t* handle = (struct nbio_t*)nbio_open(path, NBIO_READ);
 
    if (!handle)
       goto end;
diff --git a/libretro-common/formats/png/rpng_encode.c b/libretro-common/formats/png/rpng_encode.c
index 294c02bb66..b276ff47c5 100644
--- a/libretro-common/formats/png/rpng_encode.c
+++ b/libretro-common/formats/png/rpng_encode.c
@@ -95,7 +95,7 @@ static bool png_write_ihdr(RFILE *file, const struct png_ihdr *ihdr)
 
 static bool png_write_idat(RFILE *file, const uint8_t *data, size_t size)
 {
-   if (retro_fwrite(file, data, size) != size)
+   if (retro_fwrite(file, data, size) != (ssize_t)size)
       return false;
 
    if (!png_write_crc(file, data + sizeof(uint32_t), size - sizeof(uint32_t)))