diff --git a/Makefile b/Makefile
index 9747ff3..0ebef38 100644
--- a/Makefile
+++ b/Makefile
@@ -43,7 +43,7 @@ CXXFLAGS	:= $(CFLAGS) -std=c++17
 ASFLAGS	:=	-g $(ARCH)
 LDFLAGS	=	-g $(ARCH) $(RPXSPECS) -Wl,-Map,$(notdir $*.map) -T$(WUMS_ROOT)/share/libfunctionpatcher.ld $(WUMSSPECS) 
 
-LIBS	:= -lwums -lwut -lwups -lfunctionpatcher
+LIBS	:= -lwums -lwut -lwups -lfunctionpatcher -lz
 
 #-------------------------------------------------------------------------------
 # list of directories containing libraries, this must be the top level