diff --git a/1988/litmaath/Makefile b/1988/litmaath/Makefile
index ef4a4ce52..2a7826531 100644
--- a/1988/litmaath/Makefile
+++ b/1988/litmaath/Makefile
@@ -39,7 +39,7 @@ include ../../var.mk
 # Common C compiler warnings to silence
 #
 CSILENCE= -Wno-error -Wno-implicit-function-declaration -Wno-logical-op-parentheses \
-	-Wno-deprecated-non-prototype
+	-Wno-deprecated-non-prototype -Wno-implicit-int
 
 # Common C compiler warning flags
 #