diff --git a/httperf/configure.ac b/httperf/configure.ac
index 2f9aa05..5855e90 100755
--- a/httperf/configure.ac
+++ b/httperf/configure.ac
@@ -59,9 +59,7 @@ else
 fi
 
 # Checks for library functions.
-AC_FUNC_MALLOC
 AC_FUNC_MMAP
-AC_FUNC_REALLOC
 AC_FUNC_SELECT_ARGTYPES
 AC_TYPE_SIGNAL
 AC_FUNC_STRTOD