--- source/lib/netapi/netapi.c.orig	2008-06-16 22:52:22.000000000 +0200
+++ source/lib/netapi/netapi.c	2008-06-16 22:57:02.000000000 +0200
@@ -85,11 +85,13 @@
 		setenv(KRB5_ENV_CCNAME, ctx->krb5_cc_env, 1);
 	}
 
-	ctx->username = talloc_strdup(frame, getenv("USER"));
-	if (!ctx->username) {
-		TALLOC_FREE(frame);
-		fprintf(stderr, "out of memory\n");
-		return W_ERROR_V(WERR_NOMEM);
+	if (getenv("USER")) {
+		ctx->username = talloc_strdup(frame, getenv("USER"));
+		if (!ctx->username) {
+			TALLOC_FREE(frame);
+			fprintf(stderr, "libnetapi_init: out of memory\n");
+			return W_ERROR_V(WERR_NOMEM);
+		}
 	}
 
 	libnetapi_initialized = true;