diff --git a/src/PIL/BlpImagePlugin.py b/src/PIL/BlpImagePlugin.py
index b8a95db87..8585a8e60 100644
--- a/src/PIL/BlpImagePlugin.py
+++ b/src/PIL/BlpImagePlugin.py
@@ -377,9 +377,7 @@ class BLP1Decoder(_BLPBaseDecoder):
             args = image.tile[0].args
             assert isinstance(args, tuple)
             image.tile = [image.tile[0]._replace(args=(args[0], "CMYK"))]
-        r, g, b = image.convert("RGB").split()
-        reversed_image = Image.merge("RGB", (b, g, r))
-        self.set_as_raw(reversed_image.tobytes())
+        self.set_as_raw(image.convert("RGB").tobytes(), "BGR")
 
 
 class BLP2Decoder(_BLPBaseDecoder):
diff --git a/src/libImaging/Unpack.c b/src/libImaging/Unpack.c
index e9203fe4d..9c3ee2665 100644
--- a/src/libImaging/Unpack.c
+++ b/src/libImaging/Unpack.c
@@ -1664,6 +1664,7 @@ static struct {
     {"RGBA", "RGBaXX", 48, unpackRGBaskip2},
     {"RGBA", "RGBa;16L", 64, unpackRGBa16L},
     {"RGBA", "RGBa;16B", 64, unpackRGBa16B},
+    {"RGBA", "BGR", 24, ImagingUnpackBGR},
     {"RGBA", "BGRa", 32, unpackBGRa},
     {"RGBA", "RGBA;I", 32, unpackRGBAI},
     {"RGBA", "RGBA;L", 32, unpackRGBAL},