diff --git a/CHANGELOG.md b/CHANGELOG.md
index daad1197..eace8b6d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,9 @@ Release candidate for the next feature release, expected around 1 February 2025.
 
  - Fixes to GCC version checking for macros.
 
+ - Fixed dummy `readeph()` implementation in `readeph0.c`, and `DEFAULT_READEPH` in `config.mk`. `readeph0.c` is not
+   linked by default, and was not linked in prior releases either.
+
 
 ### Added
 
@@ -114,6 +117,8 @@ Release candidate for the next feature release, expected around 1 February 2025.
    
  - Added `-g` to default `CFLAGS` as a matter of GNU best practice.
  
+ - Static library is now named `ibsupernovas.a`, which is symlinked to `libnovas.a` for back compatibility.
+ 
  - Various small tweaks to Makefiles.
  
  - Updated `README.md` documentation.
diff --git a/config.mk b/config.mk
index 83a1aee5..f1850924 100644
--- a/config.mk
+++ b/config.mk
@@ -74,7 +74,7 @@ endif
 # Compile library with a default readeph() implementation for solsys1.c, which 
 # will be used only if the application does not define another implementation 
 # via calls to the to set_ephem_reader() function.
-DEFAULT_READEPH ?= $(SRC)/readeph0.c
+#DEFAULT_READEPH ?= $(SRC)/readeph0.c
 
 
 # Whether to build into the library planet_jplint() routines provided in 
@@ -190,7 +190,7 @@ ifeq ($(BUILTIN_SOLSYS_EPHEM), 1)
   SOURCES += $(SRC)/solsys-ephem.c
 endif
 
-ifdef (DEFAULT_READEPH) 
+ifdef DEFAULT_READEPH
   SOURCES += $(DEFAULT_READEPH)
   CPPFLAGS += -DDEFAULT_READEPH=1
 endif
diff --git a/src/readeph0.c b/src/readeph0.c
index 62f32fb8..f605b7cc 100644
--- a/src/readeph0.c
+++ b/src/readeph0.c
@@ -28,17 +28,19 @@ double * readeph_dummy(int mp, const char *name, double jd_tdb, int *error) {
 
   if(!name || !error) {
     novas_set_errno(EINVAL, fn, "NULL parameter: name=%p, error=%p", name, error);
+    if(error) *error = -1;
     return NULL;
   }
 
   if(isnanf(jd_tdb)) {
-    novas_set_errno(-1, EINVAL, fn, "NaN jd_tdb");
+    novas_set_errno(EINVAL, fn, "NaN jd_tdb");
     *error = -1;
     return NULL;
   }
 
   pv = (double*) calloc(6, sizeof(double));
-  *error = 9;
+  if(pv) *error = 0;
+  else *error = -1;
 
   return pv;
 }
diff --git a/test/Makefile b/test/Makefile
index 83d96415..da0c91fa 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -12,7 +12,7 @@ LDFLAGS += -fprofile-arcs -ftest-coverage -lm
 include ../config.mk
 
 #OBJECTS := $(subst obj/,,$(OBJECTS))
-OBJECTS := novas.o nutation.o solsys3.o super.o frames.o timescale.o refract.o naif.o
+OBJECTS := novas.o nutation.o solsys3.o super.o frames.o timescale.o refract.o naif.o readeph0.o
 TESTS := test-compat test-cio_file test-super test-errors
 COVFILES := novas.c.gcov nutation.c.gcov solsys3.c.gcov super.c.gcov timescale.c.gcov refract.c.gcov frames.c.gcov naif.c.gcov
 
diff --git a/test/src/test-cspice.c b/test/src/test-cspice.c
index 56c41a3c..f14f356a 100644
--- a/test/src/test-cspice.c
+++ b/test/src/test-cspice.c
@@ -65,7 +65,6 @@ static int test_cspice() {
   double jd = NOVAS_JD_J2000;
   double jd2[2] = { jd, 0.0 };
 
-  char filename[1024];
   object earth, mars;
 
   make_planet(NOVAS_EARTH, &earth);
@@ -91,7 +90,6 @@ static int test_cspice_planet() {
   double jd = NOVAS_JD_J2000;
   double jd2[2] = { jd, 0.0 };
 
-  char filename[1024];
   object ssb, sun, earth, moon, mars, phobos;
 
   make_planet(NOVAS_SSB, &ssb);