diff --git a/benchmarks/eko/benchmark_strong_coupling.py b/benchmarks/eko/benchmark_strong_coupling.py
index 9298b1cf3..fe7a24d3d 100644
--- a/benchmarks/eko/benchmark_strong_coupling.py
+++ b/benchmarks/eko/benchmark_strong_coupling.py
@@ -7,8 +7,9 @@
 from eko.beta import beta_qcd
 from eko.couplings import Couplings
 from eko.io.runcards import TheoryCard
+from eko.io.types import FlavorsNumber
 from eko.quantities.couplings import CouplingEvolutionMethod, CouplingsInfo
-from eko.quantities.heavy_quarks import FlavorsNumber, QuarkMassScheme
+from eko.quantities.heavy_quarks import QuarkMassScheme
 
 # try to load LHAPDF - if not available, we'll use the cached values
 try: