diff --git a/cpp/FactorGraph-inl.h b/cpp/FactorGraph-inl.h
index b7163d65f..3ee00b433 100644
--- a/cpp/FactorGraph-inl.h
+++ b/cpp/FactorGraph-inl.h
@@ -54,7 +54,7 @@ template<class Factor>
 void FactorGraph<Factor>::print(const string& s) const {
 	cout << s << endl;
 	printf("size: %d\n", (int) size());
-	for (int i = 0; i < factors_.size(); i++) {
+	for (size_t i = 0; i < factors_.size(); i++) {
 		stringstream ss;
 		ss << "factor " << i << ":";
 		if (factors_[i] != NULL) factors_[i]->print(ss.str());
diff --git a/cpp/Matrix.cpp b/cpp/Matrix.cpp
index 39bf7bf08..7d3d70388 100644
--- a/cpp/Matrix.cpp
+++ b/cpp/Matrix.cpp
@@ -536,6 +536,9 @@ inline void updateAb_manual(Matrix& A, Vector& b, int j, const Vector& a,
 	}
 }
 
+/**
+ * Perform updates of system matrices
+ */
 static void updateAb(Matrix& A, Vector& b, int j, const Vector& a,
 		const Vector& r, double d) {
 #ifdef GSL
diff --git a/cpp/Matrix.h b/cpp/Matrix.h
index d851ee092..3bba01839 100644
--- a/cpp/Matrix.h
+++ b/cpp/Matrix.h
@@ -210,12 +210,6 @@ void solve(Matrix& A, Matrix& B);
  */
 Matrix inverse(const Matrix& A);
 
-/**
- * Perform updates of system matrices
- */
-static void updateAb(Matrix& A, Vector& b, int j, const Vector& a,
-		const Vector& r, double d);
-
 /**
  * QR factorization, inefficient, best use imperative householder below
  * m*n matrix -> m*m Q, m*n R