diff --git a/src/Makefile.am b/src/Makefile.am
index 82269e0..c0fafa0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -9,7 +9,7 @@ AM_CFLAGS =	-std=c99
 
 lib_LTLIBRARIES = libhsm.la
 libhsm_la_SOURCES = libhsm.c compat/strlcpy.c compat/strlcat.c
-libhsm_la_LDFLAGS = -dl -version-info @LIBTOOL_VERSION_INFO@
+libhsm_la_LDFLAGS = -dl -version-info @LIBTOOL_VERSION_INFO@ -export-symbols-regex '^hsm_.*'
 libhsm_la_LIBADD = @LDNS_LIBS@ @XML2_LIBS@
 nobase_include_HEADERS = $(srcdir)/*.h