diff --git a/.travis.yml b/.travis.yml
index 24bc258..e194bbc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,7 @@ matrix:
   include:
     - compiler: gcc
       env:
-        - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"
+        - MATRIX_EVAL="USING_CMAKE=0 CC=gcc-7 && CXX=g++-7"
     - compiler: clang
     - compiler: clang
       env:
diff --git a/src/memory/resource.hpp b/src/memory/resource.hpp
index 6573643..aee1676 100644
--- a/src/memory/resource.hpp
+++ b/src/memory/resource.hpp
@@ -34,7 +34,7 @@ constexpr void static_for(std::index_sequence<I...>, F&& f) {
 #else /*__cplusplus < 201703L*/
 inline void static_for(std::index_sequence<I...>, F&& f) {
 #endif/*__cplusplus < 201703L*/
-    auto IPC_UNUSED_ expand = { (f(std::integral_constant<size_t, I>{}), 0)... };
+    IPC_UNUSED_ auto expand = { (f(std::integral_constant<size_t, I>{}), 0)... };
 }
 
 template <std::size_t Size>
diff --git a/src/memory/wrapper.hpp b/src/memory/wrapper.hpp
index 92f7416..d97da4e 100644
--- a/src/memory/wrapper.hpp
+++ b/src/memory/wrapper.hpp
@@ -53,7 +53,7 @@ private:
         alloc_t(synchronized* t)
             : t_ { t } {
             {
-                auto IPC_UNUSED_ guard = ipc::detail::unique_lock(t_->lc_);
+                IPC_UNUSED_ auto guard = ipc::detail::unique_lock(t_->lc_);
                 auto it = t_->allocs_.begin();
                 if (it != t_->allocs_.end()) {
                     std::tie(s_, a_) = *it;
@@ -66,7 +66,7 @@ private:
         }
 
         ~alloc_t() {
-            auto IPC_UNUSED_ guard = ipc::detail::unique_lock(t_->lc_);
+            IPC_UNUSED_ auto guard = ipc::detail::unique_lock(t_->lc_);
             t_->allocs_.emplace(s_, a_);
         }
 
diff --git a/src/platform/shm_linux.cpp b/src/platform/shm_linux.cpp
index baf79e0..c41d57c 100644
--- a/src/platform/shm_linux.cpp
+++ b/src/platform/shm_linux.cpp
@@ -66,7 +66,7 @@ void* acquire(char const * name, std::size_t size) {
     auto acc = acc_of(mem);
     acc->fetch_add(1, std::memory_order_release);
     {
-        auto IPC_UNUSED_ guard = ipc::detail::unique_lock(m2h()->lc_);
+        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(m2h()->lc_);
         m2h()->cache_.emplace(++acc, std::move(op_name));
     }
     return acc;
@@ -76,7 +76,7 @@ void release(void* mem, std::size_t size) {
     if (mem == nullptr) {
         return;
     }
-    auto IPC_UNUSED_ guard = ipc::detail::unique_lock(m2h()->lc_);
+    IPC_UNUSED_ auto guard = ipc::detail::unique_lock(m2h()->lc_);
     auto& cc = m2h()->cache_;
     auto it = cc.find(mem);
     if (it == cc.end()) {
diff --git a/src/platform/shm_win.cpp b/src/platform/shm_win.cpp
index 225e38b..3e6a671 100644
--- a/src/platform/shm_win.cpp
+++ b/src/platform/shm_win.cpp
@@ -43,7 +43,7 @@ void* acquire(char const * name, std::size_t size) {
         return nullptr;
     }
     {
-        auto IPC_UNUSED_ guard = ipc::detail::unique_lock(m2h()->lc_);
+        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(m2h()->lc_);
         m2h()->cache_.emplace(mem, h);
     }
     return mem;
@@ -53,7 +53,7 @@ void release(void* mem, std::size_t /*size*/) {
     if (mem == nullptr) {
         return;
     }
-    auto IPC_UNUSED_ guard = ipc::detail::unique_lock(m2h()->lc_);
+    IPC_UNUSED_ auto guard = ipc::detail::unique_lock(m2h()->lc_);
     auto& cc = m2h()->cache_;
     auto it = cc.find(mem);
     if (it == cc.end()) {
diff --git a/src/platform/waiter_linux.h b/src/platform/waiter_linux.h
index 2ffec49..cd3bd27 100644
--- a/src/platform/waiter_linux.h
+++ b/src/platform/waiter_linux.h
@@ -60,7 +60,7 @@ public:
             if (::pthread_mutexattr_init(&mutex_attr) != 0) {
                 return invalid();
             }
-            auto IPC_UNUSED_ guard_mutex_attr = unique_ptr(&mutex_attr, ::pthread_mutexattr_destroy);
+            IPC_UNUSED_ auto guard_mutex_attr = unique_ptr(&mutex_attr, ::pthread_mutexattr_destroy);
             if (::pthread_mutexattr_setpshared(&mutex_attr, PTHREAD_PROCESS_SHARED) != 0) {
                 return invalid();
             }
@@ -73,7 +73,7 @@ public:
             if (::pthread_condattr_init(&cond_attr) != 0) {
                 return invalid();
             }
-            auto IPC_UNUSED_ guard_cond_attr = unique_ptr(&cond_attr, ::pthread_condattr_destroy);
+            IPC_UNUSED_ auto guard_cond_attr = unique_ptr(&cond_attr, ::pthread_condattr_destroy);
             if (::pthread_condattr_setpshared(&cond_attr, PTHREAD_PROCESS_SHARED) != 0) {
                 return invalid();
             }
@@ -102,7 +102,7 @@ public:
         if (::pthread_mutex_lock(&(w->mutex_)) != 0) {
             return false;
         }
-        auto IPC_UNUSED_ guard = unique_ptr(&(w->mutex_), ::pthread_mutex_unlock);
+        IPC_UNUSED_ auto guard = unique_ptr(&(w->mutex_), ::pthread_mutex_unlock);
         if (::pthread_cond_wait(&(w->cond_), &(w->mutex_)) != 0) {
             return false;
         }