diff --git a/Math.body.php b/Math.body.php
index af0b6e0..6494637 100644
--- a/Math.body.php
+++ b/Math.body.php
@@ -382,6 +382,10 @@ class MathRenderer {
 	}
 
 	public static function renderMath( $tex, $params = array(), ParserOptions $parserOptions = null ) {
+		if( trim( $tex ) == "" ) {
+			return "";
+		}
+
 		$math = new MathRenderer( $tex, $params );
 		if ( $parserOptions ) {
 			$math->setOutputMode( $parserOptions->getMath() );
diff --git a/mathParserTests.txt b/mathParserTests.txt
index 51691d4..5580c81 100644
--- a/mathParserTests.txt
+++ b/mathParserTests.txt
@@ -165,3 +165,18 @@ BUG 31442: Math accents with math font fail to parse if braces not used
 <p><img class="tex" alt="\tilde \mathcal{M}" src="/images/math/5/5/0/55072ce6ef8c840c4b7687bd8a028bde.png" />
 </p>
 !! end
+
+!! test
+BUG 31824: Empty math tag returns uniq
+!! input
+<math></math>
+!! result
+!! end
+
+!! test
+BUG 31824: Empty math tag returns uniq
+!! input
+<math> </math>
+!! result
+!! end
+