diff --git a/src/Gui/CMakeLists.txt b/src/Gui/CMakeLists.txt
index 8faec7585..65c498c70 100644
--- a/src/Gui/CMakeLists.txt
+++ b/src/Gui/CMakeLists.txt
@@ -4,6 +4,10 @@ if(WIN32)
 add_definitions(-DFCGui -DQIIS_MAKEDLL -DOVR_OS_WIN32 -DQUARTER_INTERNAL -DQUARTER_MAKE_DLL -DCOIN_DLL)
 endif(WIN32)
 
+IF(CMAKE_BUILD_TYPE)
+    add_definitions(-DCMAKE_BUILD_TYPE="${CMAKE_BUILD_TYPE}")
+ENDIF(CMAKE_BUILD_TYPE)
+
 if (FREECAD_USE_3DCONNEXION)
     add_definitions(-D_USE_3DCONNEXION_SDK)
     if(APPLE)
diff --git a/src/Gui/Splashscreen.cpp b/src/Gui/Splashscreen.cpp
index c1420f016..98249c608 100644
--- a/src/Gui/Splashscreen.cpp
+++ b/src/Gui/Splashscreen.cpp
@@ -526,10 +526,12 @@ void AboutDialog::on_copyButton_clicked()
     }
     str << "Word size of " << exe << ": " << QSysInfo::WordSize << "-bit" << endl;
     str << "Version: " << major << "." << minor << "." << build << endl;
-#if defined(_DEBUG)
+#if defined(_DEBUG) || defined(DEBUG)
     str << "Build type: Debug" << endl;
 #elif defined(NDEBUG)
     str << "Build type: Release" << endl;
+#elif defined(CMAKE_BUILD_TYPE)
+    str << "Build type: " << CMAKE_BUILD_TYPE << endl;
 #else
     str << "Build type: Unknown" << endl;
 #endif