diff --git a/code/game/machinery/computer/aifixer.dm b/code/game/machinery/computer/aifixer.dm
index 0a925ba1b8c..38ec50abc6e 100644
--- a/code/game/machinery/computer/aifixer.dm
+++ b/code/game/machinery/computer/aifixer.dm
@@ -63,6 +63,7 @@
 		if("fix")
 			if(active) // Prevent from starting a fix while fixing.
 				to_chat(usr, "<span class='warning'>You are already fixing this AI!</span>")
+				return
 			active = TRUE
 			INVOKE_ASYNC(src, .proc/fix_ai)
 			add_fingerprint(usr)