diff --git a/pyproj/database.pyx b/pyproj/database.pyx
index 8a53131f5..d04fae5a5 100644
--- a/pyproj/database.pyx
+++ b/pyproj/database.pyx
@@ -520,6 +520,9 @@ def query_geodetic_crs_from_datum(
     list[CRS]
     """
 
+    if pj_type is not None and not isinstance(pj_type, PJType):
+        pj_type = PJType.create(pj_type)
+
     cdef const char* c_crs_type = NULL
     if pj_type is None:
         pass
diff --git a/test/test_database.py b/test/test_database.py
index 551e8c5b5..c1bfa5bd1 100644
--- a/test/test_database.py
+++ b/test/test_database.py
@@ -285,6 +285,10 @@ def test_get_database_metadata__invalid():
 
 
 def test_query_geodetic_crs_from_datum():
+    crss = query_geodetic_crs_from_datum("EPSG", "EPSG", "1116", "GEOCENTRIC_CRS")
+    assert len(crss) == 1
+    assert crss[0].to_authority()[1] == "6317"
+
     crss = query_geodetic_crs_from_datum("EPSG", "EPSG", "1116", PJType.GEOCENTRIC_CRS)
     assert len(crss) == 1
     assert crss[0].to_authority()[1] == "6317"
@@ -317,6 +321,9 @@ def test_query_geodetic_crs_from_datum_invalid():
     with pytest.raises(ValueError):
         query_geodetic_crs_from_datum("EPSG", "EPSG", "1116", PJType.PROJECTED_CRS)
 
+    with pytest.raises(ValueError):
+        query_geodetic_crs_from_datum("EPSG", "EPSG", "1116", "invalid string")
+
     with pytest.raises(TypeError):
         query_geodetic_crs_from_datum("EPSG", "EPSG", None)