diff --git a/doc/FreeCol.tex b/doc/FreeCol.tex
index 5112a093b..820ca7adb 100644
--- a/doc/FreeCol.tex
+++ b/doc/FreeCol.tex
@@ -288,7 +288,7 @@ In order to compile FreeCol you will need Java and
 \href{http://ant.apache.org/}{the Ant build system}. When these are
 installed, go to the root directory of FreeCol and type \verb$ant$ to
 build a JAR file containing the game. The game is started using the
-command \verb$java -Xmx1G -jar FreeCol.jar$.
+command \verb$java -Xmx2G -jar FreeCol.jar$.
 
 If something goes wrong, please open a bug report at the
 \href{http://sourceforge.net/projects/freecol}{SourceForge page of
@@ -316,7 +316,7 @@ paragraphs.
 \hypertarget{Command line options}{\subsection{Command line options}}
 
 If you are in the directory in which FreeCol is installed, you can
-start the game with the command \verb$java -Xmx1G -jar FreeCol.jar$.
+start the game with the command \verb$java -Xmx2G -jar FreeCol.jar$.
 This will tell the Virtual Machine to load the game and to set the
 maximum heap size to 512 MB. Refer to the manual of your Java Virtual
 Machine for details.
diff --git a/doc/developer.tex b/doc/developer.tex
index 3975cd119..55240aee9 100644
--- a/doc/developer.tex
+++ b/doc/developer.tex
@@ -197,7 +197,7 @@ directory of your FreeCol "working copy" in order to compile the game.
 The file \verb+FreeCol.jar+ will then be generated, and you can start
 the game simply by running the following command:
 
-\verb+java -Xmx1G -jar FreeCol.jar+
+\verb+java -Xmx2G -jar FreeCol.jar+
 
 Once Ant builds the JAR file, you can rebuild FreeCol as needed any time
 a modification to the code requires testing. Using Ant to create
diff --git a/packaging/common/README b/packaging/common/README
index 72f83af40..7e1f4d200 100644
--- a/packaging/common/README
+++ b/packaging/common/README
@@ -78,7 +78,7 @@ A: Use the command-line option --freecol-data to specify the location
 
 Q: I am unable to start the game.
 A: Try running the game in windowed mode: 
-   'java -Xmx1G -jar FreeCol.jar --windowed'
+   'java -Xmx2G -jar FreeCol.jar --windowed'
 
 
 V.   Help, Feedback & Bug Reports
diff --git a/src/net/sf/freecol/FreeCol.java b/src/net/sf/freecol/FreeCol.java
index eb9c7669f..1615358b2 100644
--- a/src/net/sf/freecol/FreeCol.java
+++ b/src/net/sf/freecol/FreeCol.java
@@ -950,7 +950,7 @@ public final class FreeCol {
      */
     private static void printUsage(Options options, int status) {
         HelpFormatter formatter = new HelpFormatter();
-        formatter.printHelp("java -Xmx1G -jar freecol.jar [OPTIONS]",
+        formatter.printHelp("java -Xmx2G -jar freecol.jar [OPTIONS]",
                             options);
         quit(status);
     }