diff --git a/include/cpp2util.h b/include/cpp2util.h
index 414aed2af5..73bb930814 100644
--- a/include/cpp2util.h
+++ b/include/cpp2util.h
@@ -1700,7 +1700,7 @@ struct args_t : std::vector<std::string_view>
 {
     args_t(int c, char** v) : vector{static_cast<std::size_t>(c)}, argc{c}, argv{v} {}
 
-    int                argc = 0;
+    mutable int        argc = 0;        //  mutable for compatibility with frameworks that take 'int& argc'
     char**             argv = nullptr;
 };
 
diff --git a/regression-tests/test-results/version b/regression-tests/test-results/version
index 87355917b6..1770107713 100644
--- a/regression-tests/test-results/version
+++ b/regression-tests/test-results/version
@@ -1,5 +1,5 @@
 
-cppfront compiler v0.3.0   Build 8C20:1033
+cppfront compiler v0.3.0   Build 8C20:1104
 Copyright(c) Herb Sutter   All rights reserved
 
 SPDX-License-Identifier: CC-BY-NC-ND-4.0
diff --git a/source/build.info b/source/build.info
index 14d90dfe87..f92d07db23 100644
--- a/source/build.info
+++ b/source/build.info
@@ -1 +1 @@
-"8C20:1033"
\ No newline at end of file
+"8C20:1104"
\ No newline at end of file