diff --git a/core/src/state.rs b/core/src/state.rs
index 014cedbf42a..bee256ab37a 100644
--- a/core/src/state.rs
+++ b/core/src/state.rs
@@ -149,7 +149,7 @@ impl State {
                     .map(|p_str| {
                         hex::decode(p_str).map_err(|e| {
                             format!(
-                                "error while decoding prefix {:?} as hex string: {:?}",
+                                "Error decoding `hashed_prefixes` hex string entry '{:?}' to bytes: {:?}",
                                 p_str, e
                             )
                         })