diff --git a/lib/krb5/eai_to_heim_errno.c b/lib/krb5/eai_to_heim_errno.c
new file mode 100644
index 000000000..6c5ce4302
--- /dev/null
+++ b/lib/krb5/eai_to_heim_errno.c
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2000 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#include <krb5_locl.h>
+
+RCSID("$Id$");
+
+krb5_error_code
+krb5_eai_to_heim_errno(int eai_errno)
+{
+    switch(eai_errno) {
+    case EAI_NOERROR:
+	return 0;
+    case EAI_ADDRFAMILY:
+	return HEIM_EAI_ADDRFAMILY;
+    case EAI_AGAIN:
+	return HEIM_EAI_AGAIN;
+    case EAI_BADFLAGS:
+	return HEIM_EAI_BADFLAGS;
+    case EAI_FAIL:
+	return HEIM_EAI_FAIL;
+    case EAI_FAMILY:
+	return HEIM_EAI_FAMILY;
+    case EAI_MEMORY:
+	return HEIM_EAI_MEMORY;
+    case EAI_NODATA:
+	return HEIM_EAI_NODATA;
+    case EAI_NONAME:
+	return HEIM_EAI_NONAME;
+    case EAI_SERVICE:
+	return HEIM_EAI_SERVICE;
+    case EAI_SOCKTYPE:
+	return HEIM_EAI_SOCKTYPE;
+    case EAI_SYSTEM:
+	return errno;
+    default:
+	return HEIM_EAI_UNKNOWN; /* XXX */
+    }
+}