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-rw-r--r--src/fringe.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/fringe.c b/src/fringe.c
index 2cea24b1dcd..febb7a53011 100644
--- a/src/fringe.c
+++ b/src/fringe.c
@@ -1330,7 +1330,7 @@ If BITMAP overrides a standard fringe bitmap, the original bitmap is restored.
*/
#if defined (HAVE_X_WINDOWS)
-static unsigned char swap_nibble[16] = {
+static const unsigned char swap_nibble[16] = {
0x0, 0x8, 0x4, 0xc, /* 0000 1000 0100 1100 */
0x2, 0xa, 0x6, 0xe, /* 0010 1010 0110 1110 */
0x1, 0x9, 0x5, 0xd, /* 0001 1001 0101 1101 */