diff --git a/tcpdf.php b/tcpdf.php
index 24106ea..a929e08 100644
--- a/tcpdf.php
+++ b/tcpdf.php
@@ -18917,13 +18917,30 @@ Putting 1 is equivalent to putting 0 and calling Ln() just after. Default value:
 				$prevlinewidth = $this->GetLineWidth();
 				$this->SetLineWidth($hrHeight);
 
-				$lineStyle = array(
-					'color' => $tag['fgcolor'],
-					'cap'   => $tag['style']['cap'],
-					'join'  => $tag['style']['join'],
-					'dash'  => $tag['style']['dash'],
-					'phase' => $tag['style']['phase'],
-				);
+				$lineStyle = array();
+                    		if (isset($tag['fgcolor'])) {
+		                        $lineStyle['color'] = $tag['fgcolor'];
+                    		}
+
+                    		if (isset($tag['fgcolor'])) {
+                        		$lineStyle['color'] = $tag['fgcolor'];
+                    		}
+
+                    		if (isset($tag['style']['cap'])) {
+                        		$lineStyle['cap'] = $tag['style']['cap'];
+                    		}
+
+                    		if (isset($tag['style']['join'])) {
+                        		$lineStyle['join'] = $tag['style']['join'];
+                    		}
+
+                    		if (isset($tag['style']['dash'])) {
+                        		$lineStyle['dash'] = $tag['style']['dash'];
+                    		}
+
+                    		if (isset($tag['style']['phase'])) {
+                        		$lineStyle['phase'] = $tag['style']['phase'];
+                    		}
 
 				$lineStyle = array_filter($lineStyle);