diff --git a/lmfdb/ecnf/main.py b/lmfdb/ecnf/main.py
index 479ac475bf..ab06e325d3 100644
--- a/lmfdb/ecnf/main.py
+++ b/lmfdb/ecnf/main.py
@@ -453,8 +453,8 @@ def postprocess(self, row, info, query):
         poly = coeff_to_poly(db.nf_fields.lookup(row['field_label'], projection='coeffs'))
         row["field_coeffs"] = poly
 
-        # Convert Weierstrass coefficients from string to a list of list of integers
-        row['ainvs'] = [[ZZ(aj) for aj in ai.split(",")] for ai in row['ainvs'].split(";")]
+        # Convert Weierstrass coefficients from string to a list of list of rationals
+        row['ainvs'] = [[QQ(aj) for aj in ai.split(",")] for ai in row['ainvs'].split(";")]
 
         return row