1 files changed, 1 insertions, 1 deletions
diff --git a/signal.c b/signal.c
index 700bd6028a..7b58840d28 100644
--- a/signal.c
+++ b/signal.c
@@ -364,7 +364,7 @@ ruby_default_signal(int sig)
 VALUE
 rb_f_kill(int argc, VALUE *argv)
 {
-#ifndef HAS_KILLPG
+#ifndef HAVE_KILLPG
 #define killpg(pg, sig) kill(-(pg), (sig))
 #endif
     int negative = 0;