diff --git a/goldendict.pro b/goldendict.pro
index 63cae269..87f7ee3b 100644
--- a/goldendict.pro
+++ b/goldendict.pro
@@ -445,7 +445,7 @@ SOURCES += \
     src/dict/belarusiantranslit.cc \
     src/dict/bgl.cc \
     src/dict/bgl_babylon.cc \
-    src/dict/customtransliteration.cpp \
+    src/dict/customtransliteration.cc \
     src/dict/dictdfiles.cc \
     src/dict/dictionary.cc \
     src/dict/dictserver.cc \
diff --git a/src/dict/customtransliteration.cpp b/src/dict/customtransliteration.cc
similarity index 100%
rename from src/dict/customtransliteration.cpp
rename to src/dict/customtransliteration.cc