diff --git a/OOequipment/Equipment.m b/OOequipment/Equipment.m
index 0f747f2..93b7425 100644
--- a/OOequipment/Equipment.m
+++ b/OOequipment/Equipment.m
@@ -214,7 +214,7 @@ classdef Equipment < handle
 		
 		function num = forceNum(input)
             %FORCENUM Throws an error if the input is not numeric.
-			if ~isnumeric(input)
+			if ~isnum(input)
 				error('Input should be a (single) number.');
 			end
 			num = input;