diff --git a/spiOverJtag/constr_xc7a_csg324.xdc b/spiOverJtag/constr_xc7a_csg324.xdc
index fd0df62..955a208 100644
--- a/spiOverJtag/constr_xc7a_csg324.xdc
+++ b/spiOverJtag/constr_xc7a_csg324.xdc
@@ -1,6 +1,7 @@
 set_property CFGBVS VCCO [current_design]
 set_property CONFIG_VOLTAGE 3.3 [current_design]
 set_property BITSTREAM.CONFIG.SPI_BUSWIDTH {4} [current_design]
+set_property BITSTREAM.GENERAL.COMPRESS TRUE [current_design]
 
 set_property -dict {PACKAGE_PIN L13 IOSTANDARD LVCMOS33} [get_ports {csn}];
 set_property -dict {PACKAGE_PIN K17 IOSTANDARD LVCMOS33} [get_ports {sdi_dq0}];