diff --git a/compiler/wasm32/aasmcpu.pas b/compiler/wasm32/aasmcpu.pas
index 45760c33e0..f334eb8735 100644
--- a/compiler/wasm32/aasmcpu.pas
+++ b/compiler/wasm32/aasmcpu.pas
@@ -611,6 +611,8 @@ uses
                     end;
                   top_const:
                     Result:=val;
+                  else
+                    internalerror(2024020805);
                 end;
             end;
         end;