diff --git a/simulator/kernel/mars/mars_kernel.cpp b/simulator/kernel/mars/mars_kernel.cpp
index b2585f3d4..174e1490e 100644
--- a/simulator/kernel/mars/mars_kernel.cpp
+++ b/simulator/kernel/mars/mars_kernel.cpp
@@ -252,7 +252,7 @@ void MARSKernel::connect_exception_handler()
     auto isa = sim->get_isa();
     if ( isa == "riscv32" || isa == "riscv64")
         connect_riscv_handler();
-    else if ( isa == "mars" || isa == "mips32le" || isa == "mips32") 
+    else if ( isa == "mars" || isa == "mars64" || isa == "mips32le" || isa == "mips32") 
         connect_mars_handler();
     else 
         throw UnsupportedISA( isa);