diff --git a/screenshot.sh b/screenshot.sh
index d5c3416..0a56f83 100755
--- a/screenshot.sh
+++ b/screenshot.sh
@@ -5,6 +5,10 @@ FORMAT="png"
 SIMILARITY_DELETE_TRESHOLD=100
 HTML_THUMB_WIDTH=200
 SCALE="50%"
+# Max time (in seconds) to wait before forcing a screenshot even if spectacle is running
+SPECTACLE_BLOCKED_TIMEOUT=600  # 10 minutes
+
+SPECTACLE_BLOCKED_FILE="$HOME/.cache/screenshot-spectacle-blocked"
 
 DAY=`date +%Y-%m-%d`
 TIME=`date +%H.%M.%S.%3N`
@@ -16,8 +20,23 @@ SCR_LAST=`ls -t $DIR/$DAY/*.png | head -n1`
 if [ "$XDG_CURRENT_DESKTOP" = "KDE" ]
 then
   if pgrep -x spectacle > /dev/null; then
-    echo "`date`: Spectacle is already running; skipping screenshot"
-    exit 0
+    # Spectacle is running; check if we've been blocked for too long
+    if [ -f "$SPECTACLE_BLOCKED_FILE" ]; then
+      BLOCKED_SINCE=`cat "$SPECTACLE_BLOCKED_FILE"`
+      NOW=`date +%s`
+      BLOCKED_FOR=$(( NOW - BLOCKED_SINCE ))
+      if [ "$BLOCKED_FOR" -ge "$SPECTACLE_BLOCKED_TIMEOUT" ]; then
+        echo "`date`: Spectacle has been blocking screenshot for ${BLOCKED_FOR}s (>= ${SPECTACLE_BLOCKED_TIMEOUT}s); forcing screenshot"
+      else
+        echo "`date`: Spectacle is already running (blocked for ${BLOCKED_FOR}s); skipping screenshot"
+        exit 0
+      fi
+    else
+      # First time we're being blocked; record the timestamp
+      date +%s > "$SPECTACLE_BLOCKED_FILE"
+      echo "`date`: Spectacle is already running; skipping screenshot (recording block time)"
+      exit 0
+    fi
   fi
   spectacle -bn -o $SCR_NEW
 else
@@ -38,6 +57,9 @@ fi
 
 echo $DISTANCE between $SCR_LAST and $SCR_NEW
 IS_SIMILAR=`echo "$DISTANCE < $SIMILARITY_DELETE_TRESHOLD" | bc`
+# Clean up the blocked-file now that a screenshot succeeded
+rm -f "$SPECTACLE_BLOCKED_FILE"
+
 if [ "$IS_SIMILAR" = "1" ]
 then
   rm $SCR_NEW