diff --git a/neo/config.h.in b/neo/config.h.in
index 39fcf5bf..9c0c951f 100644
--- a/neo/config.h.in
+++ b/neo/config.h.in
@@ -4,6 +4,8 @@
 #define BUILD_OS				"@os@"
 #define BUILD_CPU				"@cpu@"
 
+#define BUILD_LIBRARY_SUFFIX	"@CMAKE_SHARED_LIBRARY_SUFFIX@"
+
 #cmakedefine HAVE_JPEG_MEM_SRC
 
 #cmakedefine ID_ENABLE_CURL
diff --git a/neo/sys/sys_local.cpp b/neo/sys/sys_local.cpp
index 13630883..efc63893 100644
--- a/neo/sys/sys_local.cpp
+++ b/neo/sys/sys_local.cpp
@@ -98,15 +98,7 @@ void idSysLocal::DLL_Unload( uintptr_t dllHandle ) {
 }
 
 void idSysLocal::DLL_GetFileName( const char *baseName, char *dllName, int maxLength ) {
-#ifdef _WIN32
-	idStr::snPrintf( dllName, maxLength, "%s.dll", baseName );
-#elif defined( __unix__ )
-	idStr::snPrintf( dllName, maxLength, "%s.so", baseName );
-#elif defined( MACOS_X )
-	idStr::snPrintf( dllName, maxLength, "%s.dylib", baseName );
-#else
-#error OS define is required
-#endif
+	idStr::snPrintf( dllName, maxLength, "%s" BUILD_LIBRARY_SUFFIX, baseName );
 }
 
 sysEvent_t idSysLocal::GenerateMouseButtonEvent( int button, bool down ) {