diff --git a/arch/isa_parser.py b/arch/isa_parser.py
index 7c511a8b3..0d18f4d89 100755
--- a/arch/isa_parser.py
+++ b/arch/isa_parser.py
@@ -746,9 +746,9 @@ CpuModel('FullCPU', 'full_cpu_exec.cc',
          '#include "encumbered/cpu/full/dyn_inst.hh"',
          { 'CPU_exec_context': 'DynInst' })
 
-#CpuModel('AlphaFullCPU', 'alpha_o3_exec.cc',
-#         '#include "cpu/o3/alpha_dyn_inst.hh"',
-#         { 'CPU_exec_context': 'AlphaDynInst<AlphaSimpleImpl>' })
+CpuModel('AlphaFullCPU', 'alpha_o3_exec.cc',
+         '#include "cpu/o3/alpha_dyn_inst.hh"',
+         { 'CPU_exec_context': 'AlphaDynInst<AlphaSimpleImpl>' })
 
 # Expand template with CPU-specific references into a dictionary with
 # an entry for each CPU model name.  The entry key is the model name