diff --git a/code/modules/research/circuitprinter.dm b/code/modules/research/circuitprinter.dm
index dae6575577..fa93442f2e 100644
--- a/code/modules/research/circuitprinter.dm
+++ b/code/modules/research/circuitprinter.dm
@@ -142,13 +142,14 @@ using metal and glass, it uses glass and reagents (usually sulphuric acid).
 	for(var/mat in materials)
 		max_res_amount -= materials[mat]
 
+	//TFF 2/5/19: Polaris fix for Synthesisers inserting more than what is present
 	if(materials[S.material.name] + amnt <= max_res_amount)
-		if(S && S.amount >= 1)
+		if(S && S.get_amount() >= 1)
 			var/count = 0
 			overlays += "fab-load-metal"
 			spawn(10)
 				overlays -= "fab-load-metal"
-			while(materials[S.material.name] + amnt <= max_res_amount && S.amount >= 1)
+			while(materials[S.material.name] + amnt <= max_res_amount && S.get_amount() >= 1)
 				materials[S.material.name] += amnt
 				S.use(1)
 				count++
diff --git a/code/modules/research/protolathe.dm b/code/modules/research/protolathe.dm
index b90937343c..8ff4477ed3 100644
--- a/code/modules/research/protolathe.dm
+++ b/code/modules/research/protolathe.dm
@@ -130,13 +130,14 @@
 	for(var/mat in materials)
 		max_res_amount -= materials[mat]
 
+	//TFF 2/5/19: Polaris fix for Synthesisers inserting more than what is present
 	if(materials[S.material.name] + amnt <= max_res_amount)
-		if(S && S.amount >= 1)
+		if(S && S.get_amount() >= 1)
 			var/count = 0
 			overlays += "fab-load-metal"
 			spawn(10)
 				overlays -= "fab-load-metal"
-			while(materials[S.material.name] + amnt <= max_res_amount && S.amount >= 1)
+			while(materials[S.material.name] + amnt <= max_res_amount && S.get_amount() >= 1)
 				materials[S.material.name] += amnt
 				S.use(1)
 				count++