1 files changed, 3 insertions, 3 deletions
diff --git a/src/tools/optimization-options.h b/src/tools/optimization-options.h
index 30f59f04d..6af247924 100644
--- a/src/tools/optimization-options.h
+++ b/src/tools/optimization-options.h
@@ -142,12 +142,12 @@ struct OptimizationOptions : public ToolOptions {
       .add("--pass-arg",
            "-pa",
            "An argument passed along to optimization passes being run. Must be "
-           "in the form KEY:VALUE",
+           "in the form KEY@VALUE",
            Options::Arguments::N,
            [this](Options*, const std::string& argument) {
-             auto colon = argument.find(':');
+             auto colon = argument.find('@');
              if (colon == std::string::npos) {
-               Fatal() << "--pass-arg value must be in the form of KEY:VALUE";
+               Fatal() << "--pass-arg value must be in the form of KEY@VALUE";
              }
              auto key = argument.substr(0, colon);
              auto value = argument.substr(colon + 1);