diff --git a/src/mathed/InsetMathChar.cpp b/src/mathed/InsetMathChar.cpp
index 2c87824282..ae1a3b03ee 100644
--- a/src/mathed/InsetMathChar.cpp
+++ b/src/mathed/InsetMathChar.cpp
@@ -173,7 +173,7 @@ void InsetMathChar::mathmlize(MathStream & ms) const
 		case '>': entity = ">"; break;
 		case '&': entity = "&"; break;
 		case ' ': {
-			ms << from_ascii("&nsbp;");
+			ms << from_ascii("&nbsp;");
 			return;
 		}
 		default: break;