diff --git a/checks/argument.go b/checks/argument.go
index f0c5d71..a0a86e8 100644
--- a/checks/argument.go
+++ b/checks/argument.go
@@ -41,8 +41,12 @@ func (a *ArgumentAnalyzer) Check(n ast.Node) {
 	case *ast.CallExpr:
 		a.checkCallExpr(expr)
 	case *ast.GenDecl:
-		if expr.Tok == token.CONST {
-			pos := a.pass.Fset.Position(expr.TokPos)
+		if expr.Tok != token.CONST {
+			return
+		}
+
+		for _, x := range expr.Specs {
+			pos := a.pass.Fset.Position(x.Pos())
 
 			mu.Lock()
 			constantDefinitions[pos.Filename+":"+strconv.Itoa(pos.Line)] = true
diff --git a/testdata/src/argument/argument.go b/testdata/src/argument/argument.go
index da08bd9..5aa2926 100644
--- a/testdata/src/argument/argument.go
+++ b/testdata/src/argument/argument.go
@@ -14,6 +14,11 @@ var MyValue = float32(20) // want "Magic number: 20"
 
 const MyConstantValue = float32(20)
 
+const (
+	FooBlockTypeConversion = int64(512)
+	BarBlockTypeConversion = uint8(2)
+)
+
 func example() {
 	math.Abs(9.5) // want "Magic number: 9.5"
 }