1 files changed, 1 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index b246808..67266cb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,7 +43,7 @@ case $host_os in
                 ;;
         *netbsd*)
                 HOST_OS=netbsd
-                CFLAGS="$CFLAGS -D_OPENBSD_SOURCE"
+                CPPFLAGS="$CPPFLAGS -D_OPENBSD_SOURCE"
                 ;;
         *openbsd*)
                 HOST_ABI=elf