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-rw-r--r--cmd-line-utils/readline/Makefile.am2
1 files changed, 1 insertions, 1 deletions
diff --git a/cmd-line-utils/readline/Makefile.am b/cmd-line-utils/readline/Makefile.am
index e5f5717858d..e1e9645e238 100644
--- a/cmd-line-utils/readline/Makefile.am
+++ b/cmd-line-utils/readline/Makefile.am
@@ -31,7 +31,7 @@ noinst_HEADERS = readline.h chardefs.h keymaps.h \
EXTRA_DIST= emacs_keymap.c vi_keymap.c
-DEFS = -DMYSQL_CLIENT_NO_THREADS -DHAVE_CONFIG_H -DNO_KILL_INTR
+DEFS = -DMYSQL_CLIENT_NO_THREADS -DHAVE_CONFIG_H -DNO_KILL_INTR -D_GNU_SOURCE=1
# Don't update the files from bitkeeper
%::SCCS/s.%