diff --git a/src/compile.cpp b/src/compile.cpp
index 39f8f4c357..6271b94d2a 100644
--- a/src/compile.cpp
+++ b/src/compile.cpp
@@ -56,9 +56,6 @@ const bool DebugNatives = false;
 const bool DebugCallTable = false;
 const bool DebugMethodTree = false;
 const bool DebugFrameMaps = false;
-#ifndef NDEBUG
-const bool DebugIntrinsics = false;
-#endif
 
 const bool CheckArrayBounds = true;
 
diff --git a/src/system/posix.cpp b/src/system/posix.cpp
index ffcff62187..0d232f3fda 100644
--- a/src/system/posix.cpp
+++ b/src/system/posix.cpp
@@ -78,7 +78,6 @@ class MutexResource {
   pthread_mutex_t* m;
 };
 
-const int InvalidSignal = -1;
 const int VisitSignal = SIGUSR1;
 const unsigned VisitSignalIndex = 0;
 const int InterruptSignal = SIGUSR2;