diff --git a/code/modules/reagents/Chemistry-Machinery.dm b/code/modules/reagents/Chemistry-Machinery.dm
index 306faff71c0..598db4ce6eb 100644
--- a/code/modules/reagents/Chemistry-Machinery.dm
+++ b/code/modules/reagents/Chemistry-Machinery.dm
@@ -459,7 +459,7 @@
 			loaded_pill_bottle.loc = src.loc
 			loaded_pill_bottle = null
 	else if(href_list["close"])
-		usr << browse(null, "window=chemmaster")
+		usr << browse(null, "window=chem_master")
 		usr.unset_machine()
 		return