diff --git a/configure.ac b/configure.ac
index ccbb428f..d6213da0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -54,8 +54,6 @@ AC_CHECK_TYPES([ptrdiff_t])
 # Checks for library functions.
 AC_FUNC_ALLOCA
 AC_FUNC_ERROR_AT_LINE
-AC_FUNC_MALLOC
-AC_FUNC_REALLOC
 AC_CHECK_FUNCS([atexit memmove memset mkdir pow putenv strcasecmp strchr strdup strerror strncasecmp strrchr strstr strtol])
 
 AC_ARG_ENABLE([dogs], AS_HELP_STRING([--disable-dogs], [Disable support for helper dogs]))