diff --git a/src/cdrom-iso.c b/src/cdrom-iso.c
index 91caeeb8c..7847f81af 100644
--- a/src/cdrom-iso.c
+++ b/src/cdrom-iso.c
@@ -388,7 +388,7 @@ static uint32_t iso_size()
 	iso_size >>= 11;
     fclose(iso_image);
 
-	return (uint32_t) (iso_size - 1);
+	return (uint32_t) (iso_size);
 }
 
 static int iso_status()
diff --git a/src/ide.c b/src/ide.c
index cd3300612..6aa901a1c 100644
--- a/src/ide.c
+++ b/src/ide.c
@@ -503,9 +503,9 @@ static void loadhd(IDE *ide, int d, const char *fn)
 		{
 			if (image_is_hdi(fn))
 			{
-				fseek(ide->hdfile, 0x8, SEEK_SET);
+				fseeko64(ide->hdfile, 0x8, SEEK_SET);
 				fread(&(ide->base), 1, 4, ide->hdfile);
-				fseek(ide->hdfile, 0x10, SEEK_SET);
+				fseeko64(ide->hdfile, 0x10, SEEK_SET);
 				fread(&sector_size, 1, 4, ide->hdfile);
 				if (sector_size != 512)
 				{