diff --git a/2013/birken/Makefile b/2013/birken/Makefile
index deecd83ca..52150e3cd 100644
--- a/2013/birken/Makefile
+++ b/2013/birken/Makefile
@@ -39,7 +39,7 @@ include ../../var.mk
 # Common C compiler warnings to silence
 #
 CSILENCE= -Wno-newline-eof -Wno-strict-prototypes -Wno-maybe-uninitialized \
-	  -Wno-misleading-indentation -Wno-documentation
+	  -Wno-misleading-indentation
 
 # Attempt to silence unknown warnings
 #
diff --git a/2014/birken/Makefile b/2014/birken/Makefile
index 4491a7b0a..5cd1d8c1a 100644
--- a/2014/birken/Makefile
+++ b/2014/birken/Makefile
@@ -41,7 +41,7 @@ include ../../var.mk
 CSILENCE= -Wno-comment -Wno-dangling-else -Wno-error \
 	  -Wno-implicit-function-declaration -Wno-incompatible-pointer-types \
 	  -Wno-parentheses -Wno-trigraphs -Wno-newline-eof \
-	  -Wno-builtin-declaration-mismatch -Wno-sequence-point
+	  -Wno-builtin-declaration-mismatch -Wno-sequence-point -Wno-documentation
 
 # Attempt to silence unknown warnings
 #