diff --git a/server/base/src/main/java/org/apache/accumulo/server/compaction/FileCompactor.java b/server/base/src/main/java/org/apache/accumulo/server/compaction/FileCompactor.java
index b22d5a34d3c..e058db5ac82 100644
--- a/server/base/src/main/java/org/apache/accumulo/server/compaction/FileCompactor.java
+++ b/server/base/src/main/java/org/apache/accumulo/server/compaction/FileCompactor.java
@@ -323,10 +323,19 @@ public CompactionStats call() throws IOException, CompactionCanceledException,
 
     clearCurrentEntryCounts();
 
+    final boolean isMinC = env.getIteratorScope() == IteratorUtil.IteratorScope.minc;
+
+    StringBuilder newThreadName = new StringBuilder();
+    if (isMinC) {
+      newThreadName.append("MinC ");
+    } else {
+      newThreadName.append("MajC ");
+    }
+
     String oldThreadName = Thread.currentThread().getName();
-    String newThreadName =
-        "MajC compacting " + extent + " started " + threadStartDate + " file: " + outputFile;
-    Thread.currentThread().setName(newThreadName);
+    newThreadName.append("compacting ").append(extent).append(" started ").append(threadStartDate)
+        .append(" file: ").append(outputFile);
+    Thread.currentThread().setName(newThreadName.toString());
     // Use try w/ resources for clearing the thread instead of finally because clearing may throw an
     // exception. Java's handling of exceptions thrown in finally blocks is not good.
     try (var ignored = setThread()) {
@@ -348,8 +357,6 @@ public CompactionStats call() throws IOException, CompactionCanceledException,
       final EnumSet<FilePrefix> dropCacheFileTypes =
           ConfigurationTypeHelper.getDropCacheBehindFilePrefixes(dropCachePrefixProperty);
 
-      final boolean isMinC = env.getIteratorScope() == IteratorUtil.IteratorScope.minc;
-
       final boolean dropCacheBehindOutput = !RootTable.ID.equals(this.extent.tableId())
           && !MetadataTable.ID.equals(this.extent.tableId())
           && ((isMinC && acuTableConf.getBoolean(Property.TABLE_MINC_OUTPUT_DROP_CACHE))