diff --git a/definitions/common/c-11.table b/definitions/common/c-11.table
index 503b78f7b..0ad9780dc 100644
--- a/definitions/common/c-11.table
+++ b/definitions/common/c-11.table
@@ -141,5 +141,6 @@
 287 287 Swaziland (NMC)
 288 288 Togo (NMC)
 289 289 Zambia (NMC)
+291 iapc Institute of Atmospheric Physics (Chinese Academy of Sciences)
 
 65535 65535 Missing value