diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5c08e75..e8caf31 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,6 +5,10 @@ project(precomp)
 set(SRCDIR ${CMAKE_CURRENT_SOURCE_DIR})
 set(OBJDIR ${CMAKE_CURRENT_BINARY_DIR})
 
+if (NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release)
+endif()
+
 if (UNIX)
   set(CMAKE_C_FLAGS "-DLINUX -DUNIX -DHAVE_STDBOOL_H")
   set(CMAKE_C_STANDARD 99)