diff --git a/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/ModuleVisitor.java b/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/ModuleVisitor.java
index e2a259e6b94..91755e402b4 100644
--- a/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/ModuleVisitor.java
+++ b/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/ModuleVisitor.java
@@ -333,6 +333,9 @@ else if (that.getQuotedLiteral()!=null) {
                 namespace = ModuleUtil.getNamespaceFromUri(nameString);
                 name = asList(ModuleUtil.getModuleNameFromUri(nameString).split("\\."));
                 node = that.getQuotedLiteral();
+                if ("maven".equals(namespace) && !nameString.startsWith("maven:")) {
+                    node.addUsageWarning(Warning.missingImportPrefix, "use of old style Maven imports is deprecated, prefix with 'maven:'");
+                }
             }
             else {
                 namespace = null;
diff --git a/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/Warning.java b/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/Warning.java
index 4257e0e24de..9dda4e554e9 100644
--- a/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/Warning.java
+++ b/typechecker/src/com/redhat/ceylon/compiler/typechecker/analyzer/Warning.java
@@ -24,5 +24,6 @@ public enum Warning {
     disjointEquals,
     disjointContainment,
     redundantNarrowing, 
-    redundantIteration
+    redundantIteration,
+    missingImportPrefix
 }
\ No newline at end of file