diff --git a/findversion.sh b/findversion.sh
--- a/findversion.sh
+++ b/findversion.sh
@@ -94,7 +94,7 @@ elif [ -d "$ROOT_DIR/.hg" ]; then
 	HASH=`LC_ALL=C hg parents 2>/dev/null | head -n 1 | cut -d: -f3 | cut -c1-8`
 	REV="h$HASH"
 	BRANCH=`hg branch | sed 's/^default$//'`
-	REV_NR=`LC_ALL=C hg log -k "svn" -l 1 --template "{desc}\n" "$SRC_DIR" | grep "^(svn r[0-9]*)" | head -n 1 | sed "s/.*(svn r\([0-9]*\)).*/\1/"`
+	REV_NR=`LC_ALL=C hg log -r $HASH:0 -k "svn" -l 1 --template "{desc}\n" "$SRC_DIR" | grep "^(svn r[0-9]*)" | head -n 1 | sed "s/.*(svn r\([0-9]*\)).*/\1/"`
 else
 	# We don't know
 	MODIFIED="1"
diff --git a/projects/determineversion.vbs b/projects/determineversion.vbs
--- a/projects/determineversion.vbs
+++ b/projects/determineversion.vbs
@@ -41,7 +41,7 @@ Sub UpdateFiles(version)
 				revision = Mid(revision, 1, InStr(revision, "-") - 1)
 			End If
 		Case "h" ' mercurial (hg)
-			Set oExec = WshShell.Exec("hg log -k " & Chr(34) & "svn" & Chr(34) & " -l 1 --template " & Chr(34) & "{desc}\n" & Chr(34) & " ../src")
+			Set oExec = WshShell.Exec("hg log -r " & Mid(version, 2, 8) & ":0 -k " & Chr(34) & "svn" & Chr(34) & " -l 1 --template " & Chr(34) & "{desc}\n" & Chr(34) & " ../src")
 			If Err.Number = 0 Then
 				revision = Mid(OExec.StdOut.ReadLine(), 7)
 				revision = Mid(revision, 1, InStr(revision, ")") - 1)