diff --git a/configure.in b/configure.in
index 2ca7b75bc..a62828c89 100644
--- a/configure.in
+++ b/configure.in
@@ -547,6 +547,14 @@ dnl
 dnl crypto functions tests
 dnl
 
+AC_CHECK_HEADERS([				\
+	openssl/md4.h				\
+	openssl/md5.h				\
+	openssl/sha.h				\
+	openssl/des.h				\
+	openssl/rc4.h				\
+])
+
 AC_FIND_FUNC_NO_LIBS2(MD4Init, crypto des, [], [], [], [$LIB_krb4])
 AC_FIND_FUNC_NO_LIBS2(MD4_Init, crypto des, [], [], [], [$LIB_krb4])
 AC_FIND_FUNC_NO_LIBS2(MD5Init, crypto des, [], [], [], [$LIB_krb4])