diff --git a/serialplot.pro b/serialplot.pro
--- a/serialplot.pro
+++ b/serialplot.pro
@@ -43,7 +43,9 @@ SOURCES += main.cpp\
     scalepicker.cpp \
     scalezoomer.cpp \
     portlist.cpp \
-    snapshotview.cpp
+    snapshotview.cpp \
+    snapshotmanager.cpp \
+    snapshot.cpp
 
 HEADERS  += mainwindow.h \
     utils.h \
@@ -56,7 +58,9 @@ HEADERS  += mainwindow.h \
     scalepicker.h \
     scalezoomer.h \
     portlist.h \
-    snapshotview.h
+    snapshotview.h \
+    snapshotmanager.h \
+    snapshot.h
 
 FORMS    += mainwindow.ui \
     about_dialog.ui \