diff --git a/src/drivers/libretro/libretro.c b/src/drivers/libretro/libretro.c
index 48dde84..4b0acfd 100644
--- a/src/drivers/libretro/libretro.c
+++ b/src/drivers/libretro/libretro.c
@@ -84,7 +84,7 @@ static volatile int nofocus = 0;
 
 static int32_t *sound = 0;
 static uint32_t JSReturn[2];
-static uint32_t MouseData[2];
+static uint32_t MouseData[3];
 static uint32_t current_palette = 0;
 
 int PPUViewScanline=0;