diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -61,6 +61,10 @@
     add_definitions(-mmacosx-version-min=10.9 -Wno-macro-redefined -Wno-deprecated-register)
 endif()
 
+if (CMAKE_COMPILER_IS_GNUCXX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
+    add_definitions(-Werror=delete-incomplete)
+endif()
+
  ######################
 #######################
 ## Constants defines ##
diff --git a/plugins/impex/psd/psd_layer_record.cpp b/plugins/impex/psd/psd_layer_record.cpp
--- a/plugins/impex/psd/psd_layer_record.cpp
+++ b/plugins/impex/psd/psd_layer_record.cpp
@@ -45,6 +45,7 @@
 #include <asl/kis_asl_reader_utils.h>
 
 #include "psd_pixel_utils.h"
+#include <kundo2command.h>
 
 
 // Just for pretty debug messages