diff --git a/prism/src/prism/PrismCL.java b/prism/src/prism/PrismCL.java
index a73ab349..d37895f0 100644
--- a/prism/src/prism/PrismCL.java
+++ b/prism/src/prism/PrismCL.java
@@ -2125,6 +2125,7 @@ public class PrismCL implements PrismModelListener
 		mainLog.println("-nobuild ....................... Skip model construction (just do parse/export)");
 		mainLog.println("-test .......................... Enable \"test\" mode");
 		mainLog.println("-testall ....................... Enable \"test\" mode, but don't exit on error");
+		mainLog.println("-javamaxmem .................... Set the maximum heap size for Java, e.g. 500m, 4g [default: 1g]");
 		mainLog.println();
 		mainLog.println("IMPORT OPTIONS:");
 		mainLog.println("-importpepa .................... Model description is in PEPA, not the PRISM language");