diff --git a/src/env-inl.h b/src/env-inl.h
index 423002debb..e1856d81b0 100644
--- a/src/env-inl.h
+++ b/src/env-inl.h
@@ -131,7 +131,7 @@ inline uint32_t Environment::DomainFlag::count() const {
   return fields_[kCount];
 }
 
-inline Environment::TickInfo::TickInfo() : in_tick_(false) {
+inline Environment::TickInfo::TickInfo() {
   for (int i = 0; i < kFieldsCount; ++i)
     fields_[i] = 0;
 }
@@ -144,10 +144,6 @@ inline int Environment::TickInfo::fields_count() const {
   return kFieldsCount;
 }
 
-inline bool Environment::TickInfo::in_tick() const {
-  return in_tick_;
-}
-
 inline uint32_t Environment::TickInfo::index() const {
   return fields_[kIndex];
 }
@@ -156,10 +152,6 @@ inline uint32_t Environment::TickInfo::length() const {
   return fields_[kLength];
 }
 
-inline void Environment::TickInfo::set_in_tick(bool value) {
-  in_tick_ = value;
-}
-
 inline void Environment::TickInfo::set_index(uint32_t value) {
   fields_[kIndex] = value;
 }
diff --git a/src/env.h b/src/env.h
index ec106933f0..80f43036f2 100644
--- a/src/env.h
+++ b/src/env.h
@@ -351,10 +351,8 @@ class Environment {
    public:
     inline uint32_t* fields();
     inline int fields_count() const;
-    inline bool in_tick() const;
     inline uint32_t index() const;
     inline uint32_t length() const;
-    inline void set_in_tick(bool value);
     inline void set_index(uint32_t value);
 
    private:
@@ -368,7 +366,6 @@ class Environment {
     };
 
     uint32_t fields_[kFieldsCount];
-    bool in_tick_;
 
     DISALLOW_COPY_AND_ASSIGN(TickInfo);
   };