diff --git a/pcsxr/configure.ac b/pcsxr/configure.ac
index 300bb18..128b4f9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -113,6 +113,9 @@ if test "x$have_xtest" = xno; then
AC_MSG_ERROR([unable to find xtest headers])
fi
+AC_CHECK_LIB(z, uncompress2,
+[ AC_DEFINE([HAVE_UNCOMPRESS2], [1], [Define if libz supports uncompress2]) ])
+
AM_CONDITIONAL(USE_LIBCDIO, false)
AC_ARG_ENABLE(libcdio, [ --enable-libcdio use GNU libcdio for CD-ROM support (default=no)],
diff --git a/pcsxr/libpcsxcore/cdriso.c b/pcsxr/libpcsxcore/cdriso.c
index 04e866d..fb7f28a 100644
--- a/libpcsxcore/cdriso.c
+++ b/libpcsxcore/cdriso.c
@@ -1219,6 +1219,7 @@ static int cdread_sub_mixed(FILE *f, unsigned int base, void *dest, int sector)
return ret;
}
+#ifndef HAVE_UNCOMPRESS2
static int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
{
static z_stream z;
@@ -1249,6 +1250,7 @@ static int uncompress2(void *out, unsigned long *out_size, void *in, unsigned lo
*out_size -= z.avail_out;
return ret == 1 ? 0 : ret;
}
+#endif
static int cdread_compressed(FILE *f, unsigned int base, void *dest, int sector)
{
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