diff --git a/src/dmd/cli.d b/src/dmd/cli.d
index 8fca0b43b8fe..ed73b021dd87 100644
--- a/src/dmd/cli.d
+++ b/src/dmd/cli.d
@@ -731,6 +731,7 @@ dmd -cov -unittest myprog.d
     /// Returns all available reverts
     static immutable reverts = [
         Feature("dip25", "noDIP25", "revert DIP25 changes https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md"),
+        Feature("aliasaggquals", "noAliasAggQuals", "drop qualifiers when passing an aggregate type as a template alias parameter"),
     ];
 
     /// Returns all available previews
diff --git a/src/dmd/dtemplate.d b/src/dmd/dtemplate.d
index f71412cbb81a..bdd009f9e48f 100644
--- a/src/dmd/dtemplate.d
+++ b/src/dmd/dtemplate.d
@@ -8083,7 +8083,7 @@ MATCH matchArg(TemplateParameter tp, Scope* sc, RootObject oarg, size_t i, Templ
             {
                 // Don't lose type qualifiers
                 // https://issues.dlang.org/show_bug.cgi?id=20863
-                if (ta && ta.mod)
+                if (!global.params.noAliasAggQuals && ta && ta.mod)
                     sa = oarg;
                 m = MATCH.convert;
             }
diff --git a/src/dmd/globals.d b/src/dmd/globals.d
index 1832991aa2b3..d4a422b4336c 100644
--- a/src/dmd/globals.d
+++ b/src/dmd/globals.d
@@ -152,6 +152,7 @@ extern (C++) struct Param
     bool useDIP25;          // implement http://wiki.dlang.org/DIP25
     bool noDIP25;           // revert to pre-DIP25 behavior
     bool useDIP1021;        // implement https://github.com/dlang/DIPs/blob/master/DIPs/DIP1021.md
+    bool noAliasAggQuals;   // drop qualifiers when passing an aggregate type as a template alias parameter
     bool release;           // build release version
     bool preservePaths;     // true means don't strip path from source file
     DiagnosticReporting warnings = DiagnosticReporting.off;  // how compiler warnings are handled
diff --git a/test/compilable/reverthelp.d b/test/compilable/reverthelp.d
index aaf55f26ca2d..13775d431421 100644
--- a/test/compilable/reverthelp.d
+++ b/test/compilable/reverthelp.d
@@ -6,5 +6,6 @@ TEST_OUTPUT:
 Revertable language changes listed by -revert=name:
   =all              list information on all revertable language changes
   =dip25            revert DIP25 changes https://github.com/dlang/DIPs/blob/master/DIPs/archive/DIP25.md
+  =aliasaggquals    drop qualifiers when passing an aggregate type as a template alias parameter
 ----
 */