diff --git a/crt0/crt0_mod_rom_header/app_megarom_header.s b/crt0/crt0_mod_rom_header/app_megarom_header.s
index 349e1162..fc81e9fb 100644
--- a/crt0/crt0_mod_rom_header/app_megarom_header.s
+++ b/crt0/crt0_mod_rom_header/app_megarom_header.s
@@ -33,6 +33,7 @@
         ;; ---- ordering segments for linker
         .area   _HOME
         .area   _CODE
+        .area   _APPLCODE
         .area   _INITIALIZER
         .area   _GSINIT
         .area   _GSFINAL
diff --git a/crt0/crt0_mod_rom_header/app_rom_header.s b/crt0/crt0_mod_rom_header/app_rom_header.s
index 11965221..bacf87a2 100644
--- a/crt0/crt0_mod_rom_header/app_rom_header.s
+++ b/crt0/crt0_mod_rom_header/app_rom_header.s
@@ -33,6 +33,7 @@
         ;; ---- ordering segments for linker
         .area   _HOME
         .area   _CODE
+        .area   _APPLCODE
         .area   _INITIALIZER
         .area   _GSINIT
         .area   _GSFINAL
diff --git a/mk/build.mk b/mk/build.mk
index b106970b..4d859c71 100644
--- a/mk/build.mk
+++ b/mk/build.mk
@@ -258,6 +258,7 @@ PAD2POW2 = ${LIBMSX_HOME}/bin/pad2pow2.sh
 CFLAGS ?=
 CFLAGS += -mz80 -MMD
 CFLAGS += -I ${LIBMSX_HOME}/include
+CFLAGS += --codeseg APPLCODE
 
 LIBMSX = ${LIBMSX_HOME}/lib/libmsx.lib