diff --git a/src/Dimension.cpp b/src/Dimension.cpp
index ea1d24426d..5ca5f5f7b4 100644
--- a/src/Dimension.cpp
+++ b/src/Dimension.cpp
@@ -28,10 +28,10 @@ void Dimension::operator+=(Dimension const & dim)
 
 Point::Point(int x, int y) : x_(x), y_(y)
 {
-	LASSERT(x > -1000000, x = -1000000);
-	LASSERT(x <  1000000, x =  1000000);
-	LASSERT(y > -1000000, y = -1000000);
-	LASSERT(y <  1000000, y =  1000000);
+	LASSERT(x > -1000000, x_ = -1000000);
+	LASSERT(x <  1000000, x_ =  1000000);
+	LASSERT(y > -1000000, y_ = -1000000);
+	LASSERT(y <  1000000, y_ =  1000000);
 }
 
 } // namespace lyx