diff --git a/code/modules/research/circuitprinter.dm b/code/modules/research/circuitprinter.dm
index 6daea4b60fa..4ded524e40c 100644
--- a/code/modules/research/circuitprinter.dm
+++ b/code/modules/research/circuitprinter.dm
@@ -79,7 +79,7 @@ using metal and glass, it uses glass and reagents (usually sulfuric acis).
 		if(MAT_DIAMOND)
 			return (diamond_amount - (being_built.materials[M]) >= 0)
 		else
-			return (reagents.has_reagent(M, (being_built.materials[M])) != 0)
+			return (reagents.has_reagent(M, (being_built.materials[M]/efficiency_coeff)) != 0)
 
 
 /obj/machinery/r_n_d/circuit_imprinter/proc/TotalMaterials()