diff --git a/src/SConscript b/src/SConscript
index 9825cafe7b..10faf5aaf6 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -298,7 +298,7 @@ alpha_eio_sources = Split('''
 	encumbered/eio/eio.cc
         ''')
 
-if env['TARGET_ISA'] == 'ALPHA_ISA':
+if env['TARGET_ISA'] == 'alpha':
     syscall_emulation_sources += alpha_eio_sources
     
 memtest_sources = Split('''