diff --git a/src/libipc/platform/mutex_linux.h b/src/libipc/platform/mutex_linux.h
index 2c18939..f4bb819 100644
--- a/src/libipc/platform/mutex_linux.h
+++ b/src/libipc/platform/mutex_linux.h
@@ -37,7 +37,7 @@ public:
     }
 
     bool valid() const noexcept {
-        static const tmp[sizeof(pthread_mutex_t)] {};
+        static const char tmp[sizeof(pthread_mutex_t)] {};
         return shm_.valid()
             && (mutex_ != nullptr)
             && (std::memcmp(tmp, mutex_, sizeof(pthread_mutex_t)) != 0);
diff --git a/src/libipc/platform/shm_linux.cpp b/src/libipc/platform/shm_linux.cpp
index f3396b7..da1ec9c 100755
--- a/src/libipc/platform/shm_linux.cpp
+++ b/src/libipc/platform/shm_linux.cpp
@@ -90,7 +90,7 @@ std::uint32_t get_ref(id_t id) {
     if (ii->mem_ == nullptr || ii->size_ == 0) {
         return 0;
     }
-    return acc_of(mem, ii->size_).load(std::memory_order_acquire);
+    return acc_of(ii->mem_, ii->size_).load(std::memory_order_acquire);
 }
 
 void sub_ref(id_t id) {