diff --git a/lib/shared_memory.cpp b/lib/shared_memory.cpp
index b91836be..f5f1483d 100644
--- a/lib/shared_memory.cpp
+++ b/lib/shared_memory.cpp
@@ -208,7 +208,7 @@ namespace IPC {
   ///\brief Unlinks the previously opened semaphore
   void semaphore::unlink() {
     close();
-#if defined(__CYGWIN__) || defined(_WIN32)
+#if !defined(__CYGWIN__) && !defined(_WIN32)
     if (myName.size()) {
       sem_unlink(myName.c_str());
     }
diff --git a/lib/shared_memory.h b/lib/shared_memory.h
index 343d2de0..0ec1c796 100644
--- a/lib/shared_memory.h
+++ b/lib/shared_memory.h
@@ -111,13 +111,12 @@ namespace IPC {
       char * mapped;
   };
 
-#ifdef SHM_ENABLED
-
 #if defined(__CYGWIN__) || defined(_WIN32)
   void preservePage(std::string);
   void releasePage(std::string);
 #endif
 
+#ifdef SHM_ENABLED
   ///\brief A class for managing shared memory pages.
   class sharedPage {
   public: