diff --git a/hphp/runtime/base/runtime_option.cpp b/hphp/runtime/base/runtime_option.cpp
index 5e7224843..3a48a77f3 100644
--- a/hphp/runtime/base/runtime_option.cpp
+++ b/hphp/runtime/base/runtime_option.cpp
@@ -477,7 +477,8 @@ static void setResourceLimit(int resource, Hdf rlimit, const char *nodeName) {
     }
     int ret = setrlimit(resource, &rl);
     if (ret) {
-      Logger::Error("Unable to set %s to %ld: %s (%d)", nodeName, rl.rlim_cur,
+      Logger::Error("Unable to set %s to %" PRId64 ": %s (%d)",
+                    nodeName, (int64_t)rl.rlim_cur,
                     Util::safe_strerror(errno).c_str(), errno);
     }
   }
diff --git a/hphp/runtime/base/type_variant.cpp b/hphp/runtime/base/type_variant.cpp
index 705acfaa0..854cd69cd 100644
--- a/hphp/runtime/base/type_variant.cpp
+++ b/hphp/runtime/base/type_variant.cpp
@@ -2347,7 +2347,7 @@ void Variant::unserialize(VariableUnserializer *uns,
       int64_t id = uns->readInt();
       Variant *v = uns->getByVal(id);
       if (v == nullptr) {
-        throw Exception("Id %ld out of range", id);
+        throw Exception("Id %" PRId64 " out of range", id);
       }
       operator=(*v);
     }
@@ -2357,7 +2357,7 @@ void Variant::unserialize(VariableUnserializer *uns,
       int64_t id = uns->readInt();
       Variant *v = uns->getByRef(id);
       if (v == nullptr) {
-        throw Exception("Id %ld out of range", id);
+        throw Exception("Id %" PRId64 " out of range", id);
       }
       assignRef(*v);
     }
diff --git a/hphp/runtime/ext/ext_continuation.cpp b/hphp/runtime/ext/ext_continuation.cpp
index 80aded7a8..a5b734be2 100644
--- a/hphp/runtime/ext/ext_continuation.cpp
+++ b/hphp/runtime/ext/ext_continuation.cpp
@@ -169,7 +169,6 @@ void c_Continuation::dupContVar(const StringData* name, TypedValue* src) {
     // Copy the value of the local to the cont object.
     tvDupFlattenVars(src, frame_local(fp, destId), nullptr);
   } else {
-    ActRec *contFP = fp;
     if (!fp->hasVarEnv()) {
       // This VarEnv may potentially outlive the most recently stack-allocated
       // VarEnv, so we need to heap allocate it.
diff --git a/hphp/runtime/vm/jit/translator-x64.cpp b/hphp/runtime/vm/jit/translator-x64.cpp
index a377e029c..425b0c6c3 100644
--- a/hphp/runtime/vm/jit/translator-x64.cpp
+++ b/hphp/runtime/vm/jit/translator-x64.cpp
@@ -2649,7 +2649,7 @@ TranslatorX64::emitServiceReqWork(SRFlags flags, ServiceRequest req,
     const auto& argInfo = argv[i];
     switch(argv[i].m_kind) {
       case ServiceReqArgInfo::Immediate: {
-        TRACE(3, "%lx, ", argInfo.m_imm);
+        TRACE(3, "%" PRIx64 ", ", argInfo.m_imm);
         as.    emitImmReg(argInfo.m_imm, reg);
       } break;
       case ServiceReqArgInfo::CondCode: {
diff --git a/hphp/util/service_data.cpp b/hphp/util/service_data.cpp
index 1bbb7c5c4..d432970f1 100644
--- a/hphp/util/service_data.cpp
+++ b/hphp/util/service_data.cpp
@@ -239,7 +239,7 @@ static Impl& getServiceDataInstance() {
 // creating and starting threads statically before main() starts. If that
 // happens, we'll have to wrap getServiceDataInstance around a pthread_once and
 // pay some runtime synchronization cost.
-const Impl& s_dummy = getServiceDataInstance();
+UNUSED const Impl& s_dummy = getServiceDataInstance();
 
 }  // namespace