diff --git a/ChangeLog b/ChangeLog
index ec233133..68c22fa2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,8 @@
 
 	* arduino.c: Add on to bug #26703 / patch #6866 - clear DTR/RTS
 	  when closing the port.
+	* Makefile.am: Silent warnings about signedness - they're useless
+	  and annoying, especially for 'char' vars.
 
 2009-10-22  David Hoerl <dhoerl@mac.com>
 
diff --git a/Makefile.am b/Makefile.am
index 9a68852d..e51a4c8d 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -51,7 +51,7 @@ libavrdude_a_CPPFLAGS = -DCONFIG_DIR=\"$(sysconfdir)\"
 
 avrdude_CFLAGS   = @ENABLE_WARNINGS@
 
-libavrdude_a_CFLAGS   = @ENABLE_WARNINGS@
+libavrdude_a_CFLAGS   = @ENABLE_WARNINGS@ -Wno-sign-compare -Wno-sign-conversion -Wno-pointer-sign
 
 avrdude_LDADD  = $(top_builddir)/$(noinst_LIBRARIES) @LIBUSB@ @LIBHID@ -lm