diff --git a/src/core/os.c b/src/core/os.c
index 425e6e73..a3ee2fe2 100644
--- a/src/core/os.c
+++ b/src/core/os.c
@@ -640,7 +640,7 @@ static const struct keyword_signal signal_keywords[] = {
 #ifdef SIGTERM
     {"term", SIGTERM},
 #endif
-#ifdef SIGARLM
+#ifdef SIGALRM
     {"alrm", SIGALRM},
 #endif
 #ifdef SIGHUP