diff --git a/src/mesa/main/format_pack.c b/src/mesa/main/format_pack.c
index feebdb5fdef..c7b5404af7e 100644
--- a/src/mesa/main/format_pack.c
+++ b/src/mesa/main/format_pack.c
@@ -1039,8 +1039,8 @@ pack_ubyte_SRGB8(const GLubyte src[4], void *dst)
 {
    GLubyte *d = ((GLubyte *) dst);
    d[2] = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
-   d[1] = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
-   d[0] = linear_ubyte_to_srgb_ubyte(src[RCOMP]);
+   d[1] = linear_ubyte_to_srgb_ubyte(src[GCOMP]);
+   d[0] = linear_ubyte_to_srgb_ubyte(src[BCOMP]);
 }
 
 static void