diff --git a/core/log/formatters/optional.hpp b/core/log/formatters/optional.hpp
index 5f92a41395..212f57c95a 100644
--- a/core/log/formatters/optional.hpp
+++ b/core/log/formatters/optional.hpp
@@ -22,7 +22,7 @@ struct fmt::formatter<std::optional<T>> {
 
     // Check if reached the end of the range:
     if (it != end && *it != '}') {
-      throw format_error("invalid format");
+      throw fmt::format_error("invalid format");
     }
 
     // Return an iterator past the end of the parsed range:
@@ -51,7 +51,7 @@ struct fmt::formatter<boost::optional<T>> {
 
     // Check if reached the end of the range:
     if (it != end && *it != '}') {
-      throw format_error("invalid format");
+      throw fmt::format_error("invalid format");
     }
 
     // Return an iterator past the end of the parsed range: