diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index 2c8d844..d97aa83 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -174,7 +174,7 @@
 static char alarm_doc[] =
 "alarm(seconds)\n\
 \n\
-Arrange for SIGALRM to arrive after the given number of seconds."
+Arrange for SIGALRM to arrive after the given number of seconds.";
 #endif
 
 #ifdef HAVE_PAUSE