diff --git a/src/utilities_for_matlab/readcxdata/cxfilefmt_mex.h b/src/utilities_for_matlab/readcxdata/cxfilefmt_mex.h
index 6f54822..b044081 100644
--- a/src/utilities_for_matlab/readcxdata/cxfilefmt_mex.h
+++ b/src/utilities_for_matlab/readcxdata/cxfilefmt_mex.h
@@ -564,7 +564,7 @@ typedef struct tagCxFileTgtRec_V24
    float fPosX, fPosY;
 } CXFILETGT_V24, * PCXFILETGT_V24;
 
-const int CX_RECORDTARGETS_V24 = CX_RECORDBYTES / sizeof(CXFILETGT_V24);
+#define CX_RECORDTARGETS_V24 (CX_RECORDBYTES/sizeof(CXFILETGT_V24))
 
 
 /* [deprecated a/o file version 25, Maestro 5.0.2]