diff --git a/lib/layouts/AEA.layout b/lib/layouts/AEA.layout
index 0198181e8c..930de1b159 100644
--- a/lib/layouts/AEA.layout
+++ b/lib/layouts/AEA.layout
@@ -144,6 +144,13 @@ Style Table_Notes
 	EndArgument
 End
 
+Style Theorem
+	LatexName	theorem
+	Preamble
+		\newtheorem{theorem}{Theorem}
+	EndPreamble
+End
+
 Style Algorithm
 	LatexName	algorithm
 	Preamble