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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index f6d870f332..68dbfdc146 100644
--- a/configure.ac
+++ b/configure.ac
@@ -151,7 +151,7 @@ PKG_PROG_PKG_CONFIG
## compatibility with the legacy buildsystem.
##
CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wformat -Wformat-security -Wno-unused-parameter"
-CPPFLAGS="$CPPFLAGS -DBOOST_SPIRIT_THREADSAFE -DHAVE_BUILD_INFO"
+CPPFLAGS="$CPPFLAGS -DBOOST_SPIRIT_THREADSAFE -DHAVE_BUILD_INFO -D__STDC_FORMAT_MACROS"
AC_LANG_PUSH([C++])