diff --git a/include/msiquery.h b/include/msiquery.h
index 37215f1ac72b24bc282fd49345f621f27f790ce9..ed194ddc11b78101f8783c44f4b0d837ba1b4efa 100644
--- a/include/msiquery.h
+++ b/include/msiquery.h
@@ -53,8 +53,6 @@ typedef enum tagMSIMODIFY
     MSIMODIFY_VALIDATE_DELETE = 11
 } MSIMODIFY;
 
-#define MSI_NULL_INTEGER 0x80000000
-
 #define MSIDBOPEN_READONLY (LPCTSTR)0
 #define MSIDBOPEN_TRANSACT (LPCTSTR)1
 #define MSIDBOPEN_DIRECT   (LPCTSTR)2