1 files changed, 1 insertions, 1 deletions
diff --git a/toolsrc/src/package_spec_parse_result.cpp b/toolsrc/src/package_spec_parse_result.cpp
index d7600ad5b..dc377f656 100644
--- a/toolsrc/src/package_spec_parse_result.cpp
+++ b/toolsrc/src/package_spec_parse_result.cpp
@@ -18,7 +18,7 @@ namespace vcpkg
             case package_spec_parse_result::TOO_MANY_COLONS:
                 return "Too many colons";
             case package_spec_parse_result::INVALID_CHARACTERS:
-                return "Contains invalid characters. Only alphanumeric ASCII characters and dashes are allowed";
+                return "Contains invalid characters. Only alphanumeric lowercase ASCII characters and dashes are allowed";
             default:
                 Checks::unreachable();
         }