diff --git a/analyzer.go b/analyzer.go
index 46d5019..b868856 100644
--- a/analyzer.go
+++ b/analyzer.go
@@ -82,7 +82,7 @@ func (wa *wslAnalyzer) run(pass *analysis.Pass) (interface{}, error) {
 			continue
 		}
 
-		filename := pass.Fset.PositionFor(file.Pos(), false).Filename
+		filename := pass.Fset.Position(file.Pos()).Filename
 		if !strings.HasSuffix(filename, ".go") {
 			continue
 		}
diff --git a/wsl.go b/wsl.go
index 76f4abf..8d125c2 100644
--- a/wsl.go
+++ b/wsl.go
@@ -1113,8 +1113,8 @@ func (p *processor) findLeadingAndTrailingWhitespaces(ident *ast.Ident, stmt, ne
 		return
 	}
 
-	blockStartLine = p.fileSet.PositionFor(blockStartPos, false).Line
-	blockEndLine = p.fileSet.PositionFor(blockEndPos, false).Line
+	blockStartLine = p.fileSet.Position(blockStartPos).Line
+	blockEndLine = p.fileSet.Position(blockEndPos).Line
 
 	// No whitespace possible if LBrace and RBrace is on the same line.
 	if blockStartLine == blockEndLine {
@@ -1362,14 +1362,14 @@ func isExampleFunc(ident *ast.Ident) bool {
 }
 
 func (p *processor) nodeStart(node ast.Node) int {
-	return p.fileSet.PositionFor(node.Pos(), false).Line
+	return p.fileSet.Position(node.Pos()).Line
 }
 
 func (p *processor) nodeEnd(node ast.Node) int {
-	line := p.fileSet.PositionFor(node.End(), false).Line
+	line := p.fileSet.Position(node.End()).Line
 
 	if isEmptyLabeledStmt(node) {
-		return p.fileSet.PositionFor(node.Pos(), false).Line
+		return p.fileSet.Position(node.Pos()).Line
 	}
 
 	return line
@@ -1408,7 +1408,7 @@ func (p *processor) addErrorRange(reportAt, start, end token.Pos, reason string)
 }
 
 func (p *processor) addWarning(w string, pos token.Pos, t interface{}) {
-	position := p.fileSet.PositionFor(pos, false)
+	position := p.fileSet.Position(pos)
 
 	p.warnings = append(p.warnings,
 		fmt.Sprintf("%s:%d: %s (%T)", position.Filename, position.Line, w, t),