diff -Naur a/Makefile.in b/Makefile.in
--- a/Makefile.in	2022-10-31 19:40:23.000000000 +0100
+++ b/Makefile.in	2022-12-14 23:37:10.785099554 +0100
@@ -102,7 +102,7 @@
 shared: lib${PACKAGE}${SHLIB_SUFFIX}
 
 lib${PACKAGE}${SHLIB_SUFFIX}: ${OBJECTS}
-		${SHLIB_LD} ${LDFLAGS} -o ${CFITSIO_SHLIB} ${OBJECTS} -lm ${LIBS_CURL} ${LIBS}
+		${SHLIB_LD} ${LDFLAGS} -o ${CFITSIO_SHLIB} ${OBJECTS} -lm -lz -lbz2 ${LIBS_CURL} ${LIBS}
 		@if [ "x${CFITSIO_SHLIB_SONAME}" != x ]; then \
 			ln -sf ${CFITSIO_SHLIB} ${CFITSIO_SHLIB_SONAME}; \
 			ln -sf ${CFITSIO_SHLIB_SONAME} $@; \
@@ -142,31 +142,31 @@
 		${CC} -c ${CFLAGS} ${CPPFLAGS} ${SSE_FLAGS} ${DEFS} $<
 
 smem:		smem.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm -lz
 
 testprog:	testprog.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm ${LIBS}
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 fpack:		fpack.o fpackutil.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o fpackutil.o -L. -l${PACKAGE} -lm ${LIBS}
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o fpackutil.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 funpack:	funpack.o fpackutil.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o fpackutil.o -L. -l${PACKAGE} -lm ${LIBS}
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o fpackutil.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 fitscopy:	fitscopy.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm ${LIBS}
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 speed:		speed.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm ${LIBS}
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 imcopy:		imcopy.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm ${LIBS}
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 cookbook:	cookbook.o lib${PACKAGE}.a ${OBJECTS}
-		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm ${LIBS}
+		${CC} ${LDFLAGS_BIN} ${DEFS} -o $@ ${@}.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 testf77:	testf77.o lib${PACKAGE}.a ${OBJECTS}
-		${FC} ${LDFLAGS_BIN} -o $@ ${@}.o -L. -l${PACKAGE} -lm ${LIBS}
+		${FC} ${LDFLAGS_BIN} -o $@ ${@}.o -L. -l${PACKAGE} -lm -lz ${LIBS}
 
 # Tested with bison 3.8 and flex 2.6.4
 eval:		# Rebuild eval_* files from flex/bison source