diff --git a/Makefile b/Makefile
index 1a56ffc8..abbd3b64 100644
--- a/Makefile
+++ b/Makefile
@@ -158,7 +158,7 @@ $(BUILDDIR)/%.rel: %.asm $(CCFLAGS_STAMP) | create_build_dir
 #	mv -f $(addprefix $(basename $^), .lst .rel .sym) .
 
 $(BUILDDIR)/rtlplayground.ihx: $(OBJS) $(BUILDDIR)/crtbank.rel $(BUILDDIR)/crc16.rel $(BUILDDIR)/crypto/chacha_8051.rel
-	$(CC) $(CC_FLAGS) --xram-size 49151 -Wl-bHOME=0x00000 -Wl-bBANK1=0x14000 -Wl-bBANK2=0x24000 -Wl-bBANK3=0x34000 -Wl-r -o $@ $^
+	$(CC) $(CC_FLAGS) --xram-size 48896 -Wl-bHOME=0x00000 -Wl-bBANK1=0x14000 -Wl-bBANK2=0x24000 -Wl-bBANK3=0x34000 -Wl-r -o $@ $^
 
 $(BUILDDIR)/rtlplayground.img: $(BUILDDIR)/rtlplayground.ihx
 	objcopy --input-target=ihex -O binary $< $@