diff --git a/configure.ac b/configure.ac
index 871f8939..d32fbb0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -35,8 +35,6 @@ AC_TYPE_UID_T
 
 # Checks for library functions.
 AC_FUNC_CLOSEDIR_VOID
-AC_FUNC_MALLOC
-AC_FUNC_REALLOC
 AC_TYPE_SIGNAL
 AC_FUNC_STAT
 AC_CHECK_FUNCS([memmove strncasecmp strstr strdup])