diff --git a/Common/GmshDefines.h b/Common/GmshDefines.h
index 9aad931e4bd2788d4296c8a32c4565627f71ce9e..45be8448b93933fc856f5b886531258115cdde76 100644
--- a/Common/GmshDefines.h
+++ b/Common/GmshDefines.h
@@ -29,6 +29,7 @@
 #define FORMAT_SVG           29
 #define FORMAT_MESH          30
 #define FORMAT_BDF           31
+#define FORMAT_CGNS          32
 
 // Element types in .msh file format
 #define MSH_LIN_2  1