diff --git a/include/evalhyd/evald.hpp b/include/evalhyd/evald.hpp
index e92552c556dbb322272557ba7a920d851699252e..354a32a8794a3dc48c836877b15b4d0f07f2a660 100644
--- a/include/evalhyd/evald.hpp
+++ b/include/evalhyd/evald.hpp
@@ -103,7 +103,7 @@ namespace evalhyd
     ///    bootstrap: ``std::unordered_map<std::string, int>``, optional
     ///       Parameters for the bootstrapping method used to estimate the
     ///       sampling uncertainty in the evaluation of the predictions.
-    ///       Two parameters are mandatory ('n_samples' the number of random
+    ///       Three parameters are mandatory ('n_samples' the number of random
     ///       samples, 'len_sample' the length of one sample in number of years,
     ///       and 'summary' the statistics to return to characterise the
     ///       sampling distribution), and one parameter is optional ('seed').
diff --git a/include/evalhyd/evalp.hpp b/include/evalhyd/evalp.hpp
index ccaffabcdc8c426b4858f864a0d310a210919b41..5d4c1f00328c0c0edbbe00fc785f007ab50b2f46 100644
--- a/include/evalhyd/evalp.hpp
+++ b/include/evalhyd/evalp.hpp
@@ -74,7 +74,7 @@ namespace evalhyd
     ///    bootstrap: ``std::unordered_map<std::string, int>``, optional
     ///       Parameters for the bootstrapping method used to estimate the
     ///       sampling uncertainty in the evaluation of the predictions.
-    ///       Two parameters are mandatory ('n_samples' the number of random
+    ///       Three parameters are mandatory ('n_samples' the number of random
     ///       samples, 'len_sample' the length of one sample in number of years,
     ///       and 'summary' the statistics to return to characterise the
     ///       sampling distribution), and one parameter is optional ('seed').