diff --git a/pmd-cs/src/main/java/net/sourceforge/pmd/cpd/CsTokenizer.java b/pmd-cs/src/main/java/net/sourceforge/pmd/cpd/CsTokenizer.java
index 49229f3170..9978cb4d93 100644
--- a/pmd-cs/src/main/java/net/sourceforge/pmd/cpd/CsTokenizer.java
+++ b/pmd-cs/src/main/java/net/sourceforge/pmd/cpd/CsTokenizer.java
@@ -8,9 +8,10 @@ import java.util.Properties;
 
 import org.antlr.v4.runtime.CharStream;
 
+import net.sourceforge.pmd.cpd.internal.AntlrTokenizer;
 import net.sourceforge.pmd.cpd.token.AntlrToken;
 import net.sourceforge.pmd.cpd.token.AntlrTokenFilter;
-import net.sourceforge.pmd.lang.antlr.AntlrTokenManager;
+import net.sourceforge.pmd.lang.ast.impl.antlr4.AntlrTokenManager;
 import net.sourceforge.pmd.lang.cs.antlr4.CSharpLexer;
 
 /**