diff --git a/fdt/fdt.mk.in b/fdt/fdt.mk.in
index 64d06ac0..accc080f 100644
--- a/fdt/fdt.mk.in
+++ b/fdt/fdt.mk.in
@@ -16,4 +16,4 @@ fdt_c_srcs = \
 	fdt_addresses.c \
 	fdt_overlay.c \
 
-fdt_CFLAGS = -I$(src_dir)/fdt
+fdt_CFLAGS = -I$(src_dir)/fdt -Wno-sign-compare
diff --git a/softfloat/softfloat.mk.in b/softfloat/softfloat.mk.in
index 850926a6..899f00aa 100644
--- a/softfloat/softfloat.mk.in
+++ b/softfloat/softfloat.mk.in
@@ -253,4 +253,4 @@ softfloat_install_hdrs = \
 	softfloat.h \
 	softfloat_types.h \
 
-softfloat_CFLAGS = -Wno-implicit-fallthrough
+softfloat_CFLAGS = -Wno-sign-compare -Wno-implicit-fallthrough