diff --git a/Source/Makefile.in b/Source/Makefile.in
index 606e6fa65..1197e5847 100644
--- a/Source/Makefile.in
+++ b/Source/Makefile.in
@@ -57,7 +57,7 @@ LIBEXT = .a
 
 # All these are optional.  You can redefine CFLAGS, CPPFLAGS and
 # INCLUDEFLAGS on the command line however you like.
-CFLAGS = -g -O -Wall
+CFLAGS = -g -O -Wall -Wno-implicit
 CPPFLAGS = 
 INCLUDEFLAGS =