diff --git a/casr-logbook.cabal b/casr-logbook.cabal
--- a/casr-logbook.cabal
+++ b/casr-logbook.cabal
@@ -1,5 +1,5 @@
 name:               casr-logbook
-version:            0.0.2
+version:            0.0.3
 license:            OtherLicense
 license-file:       LICENSE
 author:             Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,3 +1,7 @@
+0.0.3
+
+* Fix bug in merging two totals.
+
 0.0.2
 
 * Fix function name, `printMarkdown`.
diff --git a/src/Data/Aviation/Casr/Logbook/Totals.hs b/src/Data/Aviation/Casr/Logbook/Totals.hs
--- a/src/Data/Aviation/Casr/Logbook/Totals.hs
+++ b/src/Data/Aviation/Casr/Logbook/Totals.hs
@@ -42,14 +42,14 @@
       (total1 `mappend` total2)
       (dualhours1 `mappend` dualhours2)
       (solohours1 `mappend` solohours2)
-      (intype1 `mappend` intype2)
-      (inreg1 `mappend` inreg2)
+      (Map.unionWith mappend intype1 intype2)
+      (Map.unionWith mappend inreg1 inreg2)
       (singleengine1 `mappend` singleengine2)
       (multiengine1 `mappend` multiengine2)
       (day1 `mappend` day2)
       (night1 `mappend` night2)
       (daynight1 `mappend` daynight2)
-      (pic1 `mappend` pic2)
+      (Map.unionWith mappend pic1 pic2)
 
 instance Markdown Totals where
   markdown (Totals total dualhours solohours intype inreg singleengine multiengine day night daynight pic) =