diff --git a/C Compiler.md b/C Compiler.md
index ee63035..5d35c5a 100644
--- a/C Compiler.md	
+++ b/C Compiler.md	
@@ -9,7 +9,7 @@ The cross-development SDK for Sentinel 65X requires the Calypsi C/asm toolchain,
 
 ## Language
 
-Calypsi supports a fairly modern dialect of C, essentially C11 with some additions from later C standard revisions. The C standard library it supplies is used by the SDK, modified to work with the Sentinel 65X kernel installed to the on-board flash ROM.
+Calypsi supports a fairly modern dialect of C, essentially C99 with some additions from later C standard revisions. The C standard library it supplies is used by the SDK, modified to work with the Sentinel 65X kernel installed to the on-board flash ROM.
 
 ## Toolchain