diff --git a/1987/wall/Makefile b/1987/wall/Makefile
index 095d16fc8..b9428117b 100644
--- a/1987/wall/Makefile
+++ b/1987/wall/Makefile
@@ -41,7 +41,8 @@ include ../../var.mk
 CSILENCE= -Wno-char-subscripts -Wno-error -Wno-implicit-function-declaration \
 	-Wno-incompatible-library-redeclaration -Wno-return-type -Wno-string-plus-int \
 	-Wno-unknown-escape-sequence -Wno-deprecated-declarations \
-	-Wno-deprecated-non-prototype
+	-Wno-deprecated-non-prototype -Wno-implicit-int -Wno-incompatible-pointer-types \
+	-Wno-unused-value
 
 # Common C compiler warning flags
 #
@@ -98,7 +99,17 @@ endif
 #
 ifeq ($(CC),gcc)
 #
-#CSILENCE+=
+CSILENCE+= -Wno-missing-parameter-type -Wno-builtin-declaration-mismatch -Wno-unknown-warning-option
+#
+#CWARN+=
+#
+endif
+
+# Specific add-ons or replacements for cc only
+#
+ifeq ($(CC),cc)
+#
+CSILENCE+= -Wno-missing-parameter-type -Wno-builtin-declaration-mismatch -Wno-unknown-warning-option
 #
 #CWARN+=
 #
diff --git a/1987/wall/README.md b/1987/wall/README.md
index d9662af84..152f28736 100644
--- a/1987/wall/README.md
+++ b/1987/wall/README.md
@@ -14,10 +14,10 @@ make all
 
 ```sh
 ./wall
-# enter some strings
+# enter some numbers
 
 ./wall | some_command
-# enter some strings
+# enter some strings or numbers, depending on command
 ```
 
 
@@ -47,7 +47,6 @@ m*m
 ./wall | cat
 ```
 
-
 and enter some input like:
 
 ```