diff --git a/src/mathed/math_hullinset.C b/src/mathed/math_hullinset.C
index 0431b44f11..f08108e561 100644
--- a/src/mathed/math_hullinset.C
+++ b/src/mathed/math_hullinset.C
@@ -252,7 +252,6 @@ bool MathHullInset::numberedType() const
 
 void MathHullInset::validate(LaTeXFeatures & features) const
 {
-	
 	if (ams())
 		features.require("amsstyle");
 
diff --git a/src/mathed/math_mathmlstream.C b/src/mathed/math_mathmlstream.C
index 5df3372c40..5579ddc60d 100644
--- a/src/mathed/math_mathmlstream.C
+++ b/src/mathed/math_mathmlstream.C
@@ -227,3 +227,17 @@ WriteStream & WriteStream::operator<<(char c)
 		++line_;
 	return *this;		
 }
+
+
+WriteStream & WriteStream::operator<<(int i)
+{
+	os << i;
+	return *this;		
+}
+
+
+WriteStream & WriteStream::operator<<(unsigned int i)
+{
+	os << i;
+	return *this;		
+}
diff --git a/src/mathed/math_mathmlstream.h b/src/mathed/math_mathmlstream.h
index 330086fdec..76ec853ac7 100644
--- a/src/mathed/math_mathmlstream.h
+++ b/src/mathed/math_mathmlstream.h
@@ -115,6 +115,10 @@ struct WriteStream {
 	WriteStream & operator<<(char const *);
 	///
 	WriteStream & operator<<(char);
+	///
+	WriteStream & operator<<(int);
+	///
+	WriteStream & operator<<(unsigned int);
 
 	///
 	Buffer const * buffer;