diff --git a/scripts/mk_util.py b/scripts/mk_util.py
index 2c95bc26f..cff98818f 100644
--- a/scripts/mk_util.py
+++ b/scripts/mk_util.py
@@ -1874,7 +1874,7 @@ def mk_config():
             SLIBFLAGS = '-dynamiclib'
         elif sysname == 'Linux':
             CXXFLAGS       = '%s -fno-strict-aliasing -D_LINUX_' % CXXFLAGS
-            OS_DEFINES     = '-D_LINUX'
+            OS_DEFINES     = '-D_LINUX_'
             SO_EXT         = '.so'
             LDFLAGS        = '%s -lrt' % LDFLAGS
             SLIBFLAGS      = '-shared'