diff --git a/configure/CONFIG_SITE b/configure/CONFIG_SITE
index b0a23c3..ebc5310 100644
--- a/configure/CONFIG_SITE
+++ b/configure/CONFIG_SITE
@@ -29,6 +29,6 @@ USR_LDFLAGS += --coverage
 endif
 
 ifdef WITH_MICROBENCH
-USR_CPPFLAGS += -DPV_MB
+USR_CPPFLAGS += -DWITH_MICROBENCH
 endif