diff --git a/configure.ac b/configure.ac
index 5a76a1e..ae6a3f9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,7 +76,6 @@
 		[#include <netinet/in.h>])
 
 # Checks for library functions.
-AC_FUNC_MALLOC
 AC_CHECK_FUNCS([memset select socket strdup strerror strnlen fls vprintf])
 
 AC_CONFIG_HEADERS([dtls_config.h])