diff --git a/src/ephemeris.c b/src/ephemeris.c
index a1c57a6f3..dd963888f 100644
--- a/src/ephemeris.c
+++ b/src/ephemeris.c
@@ -407,7 +407,7 @@ extern void seph2pos(gtime_t time, const seph_t *seph, double *rs, double *dts,
     *var=var_uraeph(SYS_SBS,seph->sva);
 }
 /* select ephememeris --------------------------------------------------------*/
-static eph_t *seleph(gtime_t time, int sat, int iode, const nav_t *nav)
+eph_t *seleph(gtime_t time, int sat, int iode, const nav_t *nav)
 {
     double t,tmax,tmin;
     int i,j=-1,sys,sel=0;
diff --git a/src/rtklib.h b/src/rtklib.h
index e2abc5242..3a96bd8d5 100644
--- a/src/rtklib.h
+++ b/src/rtklib.h
@@ -1629,7 +1629,7 @@ EXPORT int tle_name_read(const char *file, tle_t *tle);
 EXPORT int tle_pos(gtime_t time, const char *name, const char *satno,
                    const char *desig, const tle_t *tle, const erp_t *erp,
                    double *rs);
-
+EXPORT  eph_t *seleph(gtime_t time, int sat, int iode, const nav_t *nav);
 /* receiver raw data functions -----------------------------------------------*/
 EXPORT unsigned int getbitu(const unsigned char *buff, int pos, int len);
 EXPORT int          getbits(const unsigned char *buff, int pos, int len);