diff --git a/debian/changelog b/debian/changelog
index 63127af..1239e43 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -5,6 +5,8 @@ dump1090-mutability (1.15~dev) UNRELEASED; urgency=medium
     isn't root. (github issue #24)
   * Don't fail on postinst if the given user exists but is outside
     the usual system user UID range. (github issue #24)
+  * Fix timestamp correction when sample blocks are dropped. (github
+    issue #43)
 
  -- Oliver Jowett <oliver@mutability.co.uk>  Thu, 19 Feb 2015 22:39:19 +0000
 
diff --git a/dump1090.c b/dump1090.c
index b5989af..8d516ea 100644
--- a/dump1090.c
+++ b/dump1090.c
@@ -1065,7 +1065,10 @@ int main(int argc, char **argv) {
 
                 // If we lost some blocks, correct the timestamp
                 if (Modes.iDataLost) {
-                    Modes.timestampBlk += (MODES_ASYNC_BUF_SAMPLES * 6 * Modes.iDataLost);
+                    if (Modes.oversample)
+                        Modes.timestampBlk += (MODES_ASYNC_BUF_SAMPLES * 5 * Modes.iDataLost);
+                    else
+                        Modes.timestampBlk += (MODES_ASYNC_BUF_SAMPLES * 6 * Modes.iDataLost);
                     Modes.stats_current.blocks_dropped += Modes.iDataLost;
                     Modes.iDataLost = 0;
                 }