diff --git a/fp-plugins/prettyurls/plugin.prettyurls.php b/fp-plugins/prettyurls/plugin.prettyurls.php
index 2b5b8a3..f363ae6 100644
--- a/fp-plugins/prettyurls/plugin.prettyurls.php
+++ b/fp-plugins/prettyurls/plugin.prettyurls.php
@@ -184,18 +184,24 @@ class Plugin_PrettyURLs {
 	}
 
 	function handle_entry($matches) {
-		if (PRETTYURLS_TITLES) {
-
-			// isset($this->index[
-			if ($this->cache_get($this->fp_params ['y'], $this->fp_params ['m'], $this->fp_params ['d'], md5($matches [1]))) {
-				$this->fp_params ['entry'] = $this->index [$this->fp_params ['y']] [$this->fp_params ['m']] [$this->fp_params ['d']] [md5($matches [1])];
-			} else {
-				// a bit hackish: we make up a fake url when there is no match,
-				// so that at the higher level the system will 404...
-				$this->fp_params ['entry'] = 'a';
-			}
-		} else {
+		if (!PRETTYURLS_TITLES) {
 			$this->fp_params ['entry'] = $matches [1];
+			return;
+		}
+
+		// data is not as expected
+		if (!array_karray_key_exists('y', $this->fp_params) || !array_karray_key_exists('m', $this->fp_params) || !array_karray_key_exists('d', $this->fp_params)) {
+			// a bit hackish: we make up a fake url when there is no match,
+			// so that at the higher level the system will 404...
+			$this->fp_params ['entry'] = 'a';
+		}
+
+		if ($this->cache_get($this->fp_params ['y'], $this->fp_params ['m'], $this->fp_params ['d'], md5($matches [1]))) {
+			$this->fp_params ['entry'] = $this->index [$this->fp_params ['y']] [$this->fp_params ['m']] [$this->fp_params ['d']] [md5($matches [1])];
+		} else {
+			// a bit hackish: we make up a fake url when there is no match,
+			// so that at the higher level the system will 404...
+			$this->fp_params ['entry'] = 'a';
 		}
 	}