diff --git a/src/main/java/dan200/computercraft/core/apis/OSAPI.java b/src/main/java/dan200/computercraft/core/apis/OSAPI.java
index 7ec4b6878c..bec16b9862 100644
--- a/src/main/java/dan200/computercraft/core/apis/OSAPI.java
+++ b/src/main/java/dan200/computercraft/core/apis/OSAPI.java
@@ -385,7 +385,7 @@ public Object[] callMethod( @Nonnull ILuaContext context, int method, @Nonnull O
             {
                 // epoch
                 String param = optString( args, 0, "ingame" );
-                switch( param )
+                switch( param.toLowerCase() )
                 {
                     case "utc":
                     {