diff --git a/sources/ptm/CMakeLists.txt b/sources/ptm/CMakeLists.txt
index 7e8b363..32d6023 100644
--- a/sources/ptm/CMakeLists.txt
+++ b/sources/ptm/CMakeLists.txt
@@ -6,6 +6,7 @@ message (STATUS "Subproject ${SUBPROJECT}")
 
 # find required libaries
 find_package (KDE4 REQUIRED)
+add_definitions (${KDE4_DEFINITIONS})
 
 add_subdirectory (po)