diff --git a/libImaging/Pack.c b/libImaging/Pack.c
index 52a478208..d38d9e5e3 100644
--- a/libImaging/Pack.c
+++ b/libImaging/Pack.c
@@ -527,9 +527,9 @@ static struct {
     {"YCbCr",  	"Cr",           8,      band2},
 
     /* LAB Color */
-    {"LAB",	    "LAB",	     24,	ImagingPackRGB},
-    {"LAB",  	"L",            8,      band0},
-    {"LAB",  	"B",           8,      band1},
+    {"LAB",	    "LAB",	       24,     ImagingPackRGB},
+    {"LAB",  	"L",           8,      band0},
+    {"LAB",  	"A",           8,      band1},
     {"LAB",  	"B",           8,      band2},
 
     /* integer */