diff --git a/simgear/ephemeris/Makefile.am b/simgear/ephemeris/Makefile.am
index 1ef7ce24..b10bf21c 100644
--- a/simgear/ephemeris/Makefile.am
+++ b/simgear/ephemeris/Makefile.am
@@ -1,6 +1,6 @@
-noinst_LIBRARIES = libAstro.a
+noinst_LIBRARIES = libEphemeris.a
 
-libAstro_a_SOURCES = \
+libEphemeris_a_SOURCES = \
 	celestialBody.cxx celestialBody.hxx \
 	ephemeris.cxx ephemeris.hxx \
 	jupiter.cxx jupiter.hxx \