diff --git a/hphp/runtime/debugger/cmd/cmd_next.cpp b/hphp/runtime/debugger/cmd/cmd_next.cpp
index 56aa6a9cf..6519c545e 100644
--- a/hphp/runtime/debugger/cmd/cmd_next.cpp
+++ b/hphp/runtime/debugger/cmd/cmd_next.cpp
@@ -214,7 +214,7 @@ bool CmdNext::atStepContOffset(Unit* unit, Offset o) {
 // simplicity of the exceptional path.
 void CmdNext::setupStepCont(ActRec* fp, PC pc) {
   // One byte + one byte argument
-  auto ops = reinterpret_cast<const Op*>(pc);
+  DEBUG_ONLY auto ops = reinterpret_cast<const Op*>(pc);
   assert(ops[0] == OpContSuspend || ops[0] == OpContSuspendK);
   assert(ops[2] == OpNull); // One byte
   assert(ops[3] == OpThrow); // One byte
diff --git a/hphp/runtime/vm/jit/translator-x64.cpp b/hphp/runtime/vm/jit/translator-x64.cpp
index 5e396c6b6..862d9088e 100644
--- a/hphp/runtime/vm/jit/translator-x64.cpp
+++ b/hphp/runtime/vm/jit/translator-x64.cpp
@@ -3250,8 +3250,8 @@ TranslatorX64::translateWork(const TranslArgs& args) {
         FTRACE(1, "trying irTranslateTracelet\n");
         assertCleanState();
         result = irTranslateTracelet(*tp);
-        static const bool requireRegion = getenv("HHVM_REQUIRE_REGION");
-        assert(IMPLIES(region && requireRegion, result != Success));
+        DEBUG_ONLY static const bool reqRegion = getenv("HHVM_REQUIRE_REGION");
+        assert(IMPLIES(region && reqRegion, result != Success));
       }
 
       if (result != Success) {