diff --git a/src/env.cc b/src/env.cc
index 341f62e1790260..7e89c2828f2003 100644
--- a/src/env.cc
+++ b/src/env.cc
@@ -211,10 +211,7 @@ void IsolateData::MemoryInfo(MemoryTracker* tracker) const {
 #define V(PropertyName, StringValue)                                           \
   tracker->TrackField(#PropertyName, PropertyName());
   PER_ISOLATE_SYMBOL_PROPERTIES(V)
-#undef V
 
-#define V(PropertyName, StringValue)                                           \
-  tracker->TrackField(#PropertyName, PropertyName());
   PER_ISOLATE_STRING_PROPERTIES(V)
 #undef V