diff --git a/gcc/Makefile b/gcc/Makefile
index dd869ba..f97cc55 100644
--- a/gcc/Makefile
+++ b/gcc/Makefile
@@ -24,7 +24,7 @@ VPATH = $(srcdir)
 
 CC ?= gcc
 
-BASE_CFLAGS = -g -std=gnu11 -Werror-implicit-function-declaration
+BASE_CFLAGS = -g -std=gnu11 -Werror-implicit-function-declaration -Wno-format-overflow
 
 INCLUDES = -I. -I$(srcdir)
 
diff --git a/gcc_arm/Makefile.in b/gcc_arm/Makefile.in
index 09a8711..c3ddb2b 100755
--- a/gcc_arm/Makefile.in
+++ b/gcc_arm/Makefile.in
@@ -64,7 +64,7 @@ ALLOCA_FINISH = true
 XCFLAGS =
 TCFLAGS =
 # CYGNUS LOCAL nowarnings/law
-CFLAGS = -g -Werror-implicit-function-declaration
+CFLAGS = -g -Werror-implicit-function-declaration -Wno-format-overflow
 BOOT_CFLAGS = -O2 $(CFLAGS)
 WARN_CFLAGS =
 # END CYGNUS LOCAL