diff --git a/msi.gama.core/src/msi/gaml/statements/SaveStatement.java b/msi.gama.core/src/msi/gaml/statements/SaveStatement.java
index 84a0bc8608..3d84ea416a 100644
--- a/msi.gama.core/src/msi/gaml/statements/SaveStatement.java
+++ b/msi.gama.core/src/msi/gaml/statements/SaveStatement.java
@@ -781,6 +781,7 @@ public void saveShape(final IList<? extends IShape> agents, final File f, final
 				final IExpression var = attributes.get(e);
 				String name = e.replace("\"", "");
 				name = name.replace("'", "");
+				name = name.replace(":", "_");
 				final String type = type(var);
 				specs.append(',').append(name).append(':').append(type);
 			}