diff --git a/src/gtk.inc b/src/gtk.inc
index f566ff981e..c9ffe9d599 100644
--- a/src/gtk.inc
+++ b/src/gtk.inc
@@ -32,6 +32,7 @@ LIB_CPP_SRC=\
  common/log.cpp \
  common/matrix.cpp \
  common/memory.cpp \
+ common/mimetype.cpp \
  common/module.cpp \
  common/object.cpp \
  common/db.cpp \
diff --git a/src/motif.inc b/src/motif.inc
index f56f9860db..b1d68b5273 100644
--- a/src/motif.inc
+++ b/src/motif.inc
@@ -32,6 +32,7 @@ LIB_CPP_SRC=\
  common/log.cpp \
  common/matrix.cpp \
  common/memory.cpp \
+ common/mimetype.cpp \
  common/module.cpp \
  common/object.cpp \
  common/postscrp.cpp \