diff --git a/src/insets/insetcollapsable.C b/src/insets/insetcollapsable.C
index 546921421b..68ea69ac4b 100644
--- a/src/insets/insetcollapsable.C
+++ b/src/insets/insetcollapsable.C
@@ -152,7 +152,7 @@ Dimension InsetCollapsable::dimensionCollapsed() const
 bool InsetCollapsable::metrics(MetricsInfo & mi, Dimension & dim) const
 {
 	autoOpen_ = mi.base.bv->cursor().isInside(this);
-	mi.base.textwidth -= (int) 1.5 * TEXT_TO_INSET_OFFSET;
+	mi.base.textwidth -= (int) (1.5 * TEXT_TO_INSET_OFFSET);
 
 	if (status() == Inlined) {
 		InsetText::metrics(mi, dim);
@@ -178,8 +178,8 @@ bool InsetCollapsable::metrics(MetricsInfo & mi, Dimension & dim) const
 	}
 	dim.asc += TEXT_TO_INSET_OFFSET;
 	dim.des += TEXT_TO_INSET_OFFSET;
-	dim.wid += (int) 1.5 * TEXT_TO_INSET_OFFSET;
-	mi.base.textwidth += (int) 1.5 * TEXT_TO_INSET_OFFSET;
+	dim.wid += (int) (1.5 * TEXT_TO_INSET_OFFSET);
+	mi.base.textwidth += (int) (1.5 * TEXT_TO_INSET_OFFSET);
 	bool const changed = dim_ != dim;
 	dim_ = dim;
 	return changed;