diff --git a/configure.ac b/configure.ac
index c256805..a82e721 100644
--- a/configure.ac
+++ b/configure.ac
@@ -68,7 +68,7 @@ AM_CONDITIONAL(SQL, test x$sql = xtrue)
 AC_SUBST(SQL)
 AC_SUBST(LFLAGS)
 
-CFLAGS="$CFLAGS -Wall -Wstrict-prototypes -Wsign-compare -Werror"
+CFLAGS="$CFLAGS -Wall -Wstrict-prototypes -Werror"
 AS_CASE([$host],
         [*mingw*|*cygwin*], [LDFLAGS="$LDFLAGS -no-undefined"], [])
 AS_CASE([$host],
diff --git a/src/libmdb/Makefile.am b/src/libmdb/Makefile.am
index 2e74a19..c8906f8 100644
--- a/src/libmdb/Makefile.am
+++ b/src/libmdb/Makefile.am
@@ -4,5 +4,5 @@ if FAKE_GLIB
 libmdb_la_SOURCES += fakeglib.c
 endif
 libmdb_la_LDFLAGS = -version-info 2:1:0 -export-symbols-regex '^(mdb_|_mdb_put_int16$$|_mdb_put_int32$$)'
-AM_CFLAGS	=	-I$(top_srcdir)/include $(GLIB_CFLAGS)
+AM_CFLAGS	=	-I$(top_srcdir)/include $(GLIB_CFLAGS) -Wsign-compare
 LIBS = $(GLIB_LIBS) @LIBS@ @LIBICONV@
diff --git a/src/util/Makefile.am b/src/util/Makefile.am
index a03c75b..d1abe6c 100644
--- a/src/util/Makefile.am
+++ b/src/util/Makefile.am
@@ -20,7 +20,7 @@ updrow_SOURCES += ../libmdb/fakeglib.c
 endif
 LIBS	=	$(GLIB_LIBS) @LIBS@
 DEFS = @DEFS@ -DLOCALEDIR=\"$(localedir)\"
-AM_CFLAGS	=	-I$(top_srcdir)/include $(GLIB_CFLAGS)
+AM_CFLAGS	=	-I$(top_srcdir)/include $(GLIB_CFLAGS) -Wsign-compare
 LDADD	=	../libmdb/libmdb.la 
 if SQL
 mdb_sql_LDADD = ../libmdb/libmdb.la ../sql/libmdbsql.la $(LIBREADLINE)