diff -up matio-1.3.3/src/Makefile.am.zlibldflag matio-1.3.3/src/Makefile.am
--- matio-1.3.3/src/Makefile.am.zlibldflag	2008-05-18 23:45:41.000000000 +0200
+++ matio-1.3.3/src/Makefile.am	2008-10-13 11:12:00.000000000 +0200
@@ -8,15 +8,17 @@ VPATH = @srcdir@
 AM_CFLAGS  = -I. $(ZLIB_CFLAGS)
 AM_LDFLAGS =
 
-if HAVE_ZLIB
-    ZLIB_SRC = inflate.c
-endif
-
 noinst_HEADERS      = matio_private.h mat4.h mat5.h
 include_HEADERS     = matio.h matioConfig.h
 lib_LTLIBRARIES     = libmatio.la
-libmatio_la_SOURCES = snprintf.c endian.c io.c $(ZLIB_SRC) read_data.c \
+libmatio_la_SOURCES = snprintf.c endian.c io.c read_data.c \
                       mat5.c mat4.c mat.c
+libmatio_la_LIBADD = 
+
+if HAVE_ZLIB
+    libmatio_la_SOURCES += inflate.c
+    libmatio_la_LIBADD += $(ZLIB_LIBS)
+endif
 
 if ENABLE_FORTRAN
     AM_FCFLAGS             = -I. -I$(top_builddir)/src/fortran