1 files changed, 2 insertions, 2 deletions

diff --git a/src/keyboard.c b/src/keyboard.c
index 3cfc1652084..19973edf33d 100644
--- a/src/keyboard.c
+++ b/src/keyboard.c
@@ -6780,7 +6780,7 @@ handle_async_input ()
 #ifdef BSD4_1
   extern int select_alarmed;
 #endif
-#ifdef HAVE_GTK_AND_PTHREAD
+#if ! defined (SYSTEM_MALLOC) && defined (HAVE_GTK_AND_PTHREAD)
   extern pthread_t main_thread;
   if (pthread_self () != main_thread)
     {
@@ -6826,7 +6826,7 @@ input_available_signal (signo)
 {
   /* Must preserve main program's value of errno.  */
   int old_errno = errno;
-#ifdef HAVE_GTK_AND_PTHREAD
+#if ! defined (SYSTEM_MALLOC) && defined (HAVE_GTK_AND_PTHREAD)
   extern pthread_t main_thread;
   if (pthread_self () != main_thread)
     {