diff --git a/twoliter/embedded/Makefile.toml b/twoliter/embedded/Makefile.toml
index 435f1b4a..ec80dae8 100644
--- a/twoliter/embedded/Makefile.toml
+++ b/twoliter/embedded/Makefile.toml
@@ -668,6 +668,24 @@ if [[ -d ${migrations_root} ]]; then
     done
 fi
 
+# Third pass: Check for missing version transitions in Release.toml
+
+mapfile -t transitions < <(grep -oP '\(\K[0-9]+\.[0-9]+\.[0-9]+,\s*[0-9]+\.[0-9]+\.[0-9]+(?=\))' Release.toml | sort -V)
+
+if [[ ${#transitions[@]} -gt 0 ]]; then
+    prev_to=""
+    for transition in "${transitions[@]}"; do
+        from=$(echo "${transition}" | cut -d',' -f1 | tr -d ' ')
+        to=$(echo "${transition}" | cut -d',' -f2 | tr -d ' ')
+
+        if [[ -n "${prev_to}" && "${prev_to}" != "${from}" ]]; then
+            problems+=("Missing version transition: (${prev_to}, ${from})")
+        fi
+
+        prev_to="${to}"
+    done
+fi
+
 # Rattle off whatever we found
 
 if [[ ${#problems[@]} -gt 0 ]]; then