diff --git a/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/CharsetInfo.java b/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/CharsetInfo.java
index 9ca02cf760..4ba8d79686 100644
--- a/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/CharsetInfo.java
+++ b/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/model/data/CharsetInfo.java
@@ -15,10 +15,11 @@
  */
 package ghidra.program.model.data;
 
+import java.util.*;
+
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.Charset;
-import java.util.*;
 
 import org.jdom.*;
 import org.jdom.input.SAXBuilder;
@@ -97,15 +98,17 @@ public class CharsetInfo {
 	 * Application initialization overhead.
 	 */
 	private void registerStandardCharsets() {
-		addCharset(USASCII, 1);
-		addCharset(UTF8, 1);
-		addCharset("ISO-8859-1", 1);
-		addCharset(UTF16, 2);
-		addCharset("UTF-16BE", 2);
-		addCharset("UTF-16LE", 2);
-		addCharset(UTF32, 4);
-		addCharset("UTF-32BE", 4);
-		addCharset("UTF-32LE", 4);
+		if (charsetInfoRecsByName.isEmpty()) {
+			addCharset(USASCII, 1);
+			addCharset(UTF8, 1);
+			addCharset("ISO-8859-1", 1);
+			addCharset(UTF16, 2);
+			addCharset("UTF-16BE", 2);
+			addCharset("UTF-16LE", 2);
+			addCharset(UTF32, 4);
+			addCharset("UTF-32BE", 4);
+			addCharset("UTF-32LE", 4);
+		}
 	}
 
 	private void addCharset(String name, int charSize) {