diff --git a/src/mathed/MathFactory.cpp b/src/mathed/MathFactory.cpp
index 274acd997f..24e35c9b68 100644
--- a/src/mathed/MathFactory.cpp
+++ b/src/mathed/MathFactory.cpp
@@ -135,6 +135,8 @@ bool isUnicodeSymbolAvailable(docstring const & name, char_type & c)
 		                                is_combining, termination);
 	}
 	return c != 0 && !is_combining;
+#else
+	return false;
 #endif
 }