diff --git a/ghidra/ghidra/Ghidra/Features/Decompiler/src/decompile/cpp/crc32.hh b/ghidra/ghidra/Ghidra/Features/Decompiler/src/decompile/cpp/crc32.hh
--- a/ghidra/ghidra/Ghidra/Features/Decompiler/src/decompile/cpp/crc32.hh
+++ b/ghidra/ghidra/Ghidra/Features/Decompiler/src/decompile/cpp/crc32.hh
@@ -16,8 +16,8 @@
 /// \file crc32.hh
 /// \brief Table and function for computing a CRC32
 
-#ifndef __CRC32__
-#define __CRC32__
+#ifndef __CRC32A__
+#define __CRC32A__
 
 #include "types.h"