diff --git a/src/blackmisc/blackmisc.pro b/src/blackmisc/blackmisc.pro
index 5fa9106eb..263247b94 100644
--- a/src/blackmisc/blackmisc.pro
+++ b/src/blackmisc/blackmisc.pro
@@ -15,6 +15,7 @@ precompile_header:!isEmpty(PRECOMPILED_HEADER) {
  }
 
 DEFINES += LOG_IN_FILE
+DEFINES += Q_OS_LINUX
 
 HEADERS += \
     logmessage.h \