Fix typos in macro names
diff --git a/include/polarssl/ccm.h b/include/polarssl/ccm.h
index f1f24bd..070b39d 100644
--- a/include/polarssl/ccm.h
+++ b/include/polarssl/ccm.h
@@ -128,4 +128,4 @@
 }
 #endif
 
-#endif /* POLARSSL_CGM_H */
+#endif /* POLARSSL_CCM_H */