diff --git a/code/game/objects/items/implants/implant_chem.dm b/code/game/objects/items/implants/implant_chem.dm
index ef36b3da92f..e266f3ab096 100644
--- a/code/game/objects/items/implants/implant_chem.dm
+++ b/code/game/objects/items/implants/implant_chem.dm
@@ -38,6 +38,10 @@
 		return 0
 	var/mob/living/carbon/R = imp_in
 	var/injectamount = null
+	if (cause == "action_button")
+		injectamount = reagents.total_volume
+	else
+		injectamount = cause
 	reagents.trans_to(R, injectamount)
 	to_chat(R, "<span class='italics'>You hear a faint beep.</span>")
 	if(!reagents.total_volume)