diff --git a/lib/libmain.c b/lib/libmain.c
index 8a14b29..74df518 100644
--- a/lib/libmain.c
+++ b/lib/libmain.c
@@ -13,7 +13,8 @@ libmain(int argc, char **argv)
 {
 	// set thisenv to point at our Env structure in envs[].
 	// LAB 3: Your code here.
-	thisenv = 0;
+	envid_t id = sys_getenvid();
+	thisenv = &envs[ENVX(id)];
 
 	// save the name of the program so that panic() can use it
 	if (argc > 0)