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-rw-r--r--libvo/vo_png.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libvo/vo_png.c b/libvo/vo_png.c
index 0e28b0e2e0..608a9a63c0 100644
--- a/libvo/vo_png.c
+++ b/libvo/vo_png.c
@@ -229,7 +229,7 @@ static int int_zero_to_nine(int *sh)
return 1;
}
-static opt_t subopts[] = {
+static const opt_t subopts[] = {
{"alpha", OPT_ARG_BOOL, &use_alpha, NULL, 0},
{"z", OPT_ARG_INT, &z_compression, (opt_test_f)int_zero_to_nine},
{NULL}