diff --git a/source/shared/core_sqlsrv.h b/source/shared/core_sqlsrv.h
index 9b6c2d2d..26d96b33 100644
--- a/source/shared/core_sqlsrv.h
+++ b/source/shared/core_sqlsrv.h
@@ -131,6 +131,11 @@ OACR_WARNING_POP
 #include <sqlext.h>
 #endif // _WIN32
 
+#if !defined(SQL_GUID)
+// imported from sqlext.h
+#define SQL_GUID            (-11)
+#endif
+
 #if !defined(WC_ERR_INVALID_CHARS)
 // imported from winnls.h as it isn't included by 5.3.0
 #define WC_ERR_INVALID_CHARS      0x00000080  // error for invalid chars
diff --git a/source/shared/typedefs_for_linux.h b/source/shared/typedefs_for_linux.h
index 45798b86..15113d85 100644
--- a/source/shared/typedefs_for_linux.h
+++ b/source/shared/typedefs_for_linux.h
@@ -95,9 +95,6 @@ typedef struct _SYSTEMTIME {
 
 typedef HINSTANCE HMODULE;  /* HMODULEs can be used in place of HINSTANCEs */
 
-//From sqlext.h
-#define SQL_GUID            (-11)
-
 size_t      mplat_wcslen( const WCHAR * );
 
 #endif // __linux_typedefs__