diff --git a/repos/ports/include/noux_session/sysio.h b/repos/ports/include/noux_session/sysio.h
index adac263cf3..249882955f 100644
--- a/repos/ports/include/noux_session/sysio.h
+++ b/repos/ports/include/noux_session/sysio.h
@@ -48,13 +48,13 @@ namespace Noux {
 		enum { MAX_PATH_LEN = 512 };
 		typedef char Path[MAX_PATH_LEN];
 
-		enum { CHUNK_SIZE = 7*1024 };
+		enum { CHUNK_SIZE = 11*1024 };
 		typedef char Chunk[CHUNK_SIZE];
 
-		enum { ARGS_MAX_LEN = 4*1024 };
+		enum { ARGS_MAX_LEN = 5*1024 };
 		typedef char Args[ARGS_MAX_LEN];
 
-		enum { ENV_MAX_LEN  = 4*1024 };
+		enum { ENV_MAX_LEN  = 6*1024 };
 		typedef char Env[ENV_MAX_LEN];
 
 		typedef __SIZE_TYPE__ size_t;