diff --git a/src/sysdep.c b/src/sysdep.c
index 119177b78a1..fae76185dbf 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -473,7 +473,7 @@ child_setup_tty (out)
 #ifdef IUCLC
   s.main.c_iflag &= ~IUCLC;	/* Disable downcasing on input.  */
 #endif
-@ifdef OLCUC
+#ifdef OLCUC
   s.main.c_oflag &= ~OLCUC;	/* Disable upcasing on output.  */
 #endif
   s.main.c_cflag = (s.main.c_cflag & ~CSIZE) | CS8; /* Don't strip 8th bit */