diff --git a/checkers/rules/rules.go b/checkers/rules/rules.go
index 37881da3b..454bcae4f 100644
--- a/checkers/rules/rules.go
+++ b/checkers/rules/rules.go
@@ -717,3 +717,18 @@ func emptyDecl(m dsl.Matcher) {
 	m.Match(`const()`).Report(`empty const() block`)
 	m.Match(`type()`).Report(`empty type() block`)
 }
+
+//doc:summary Detects bad usage of fmt.Errorf
+//doc:tags    diagnostic experimental opinionated
+//doc:before  fmt.Errorf(xs)
+//doc:after   fmt.Errorf("%s", xs)
+func undefinedFormatting(m dsl.Matcher) {
+	m.Match(`fmt.Errorf($f)`).
+		Where(!m["f"].Const).
+		Suggest("errors.New($f)").
+		Report(`use errors.New($f) or fmt.Errorf("%s", $f) instead`)
+
+	m.Match(`fmt.Errorf($f($*args))`).
+		Suggest("errors.New($f($*args))").
+		Report(`use errors.New($f($*args)) or fmt.Errorf("%s",$f($*args)) instead`)
+}
diff --git a/checkers/rulesdata/rulesdata.go b/checkers/rulesdata/rulesdata.go
index cbf13db62..ec1eb7034 100644
--- a/checkers/rulesdata/rulesdata.go
+++ b/checkers/rulesdata/rulesdata.go
@@ -2678,6 +2678,49 @@ var PrecompiledRules = &ir.File{
 				},
 			},
 		},
+		ir.RuleGroup{
+			Line:        717,
+			Name:        "undefinedFormatting",
+			MatcherName: "m",
+			DocTags: []string{
+				"diagnostic",
+				"experimental",
+			},
+			DocSummary: "Detects bad usage of fmt.Errorf",
+			DocBefore:  "fmt.Errorf(xs)",
+			DocAfter:   "fmt.Errorf(\"%s\", xs)",
+			Rules: []ir.Rule{
+				ir.Rule{
+					Line: 718,
+					SyntaxPatterns: []ir.PatternString{
+						ir.PatternString{Line: 718, Value: "fmt.Errorf($f)"},
+					},
+					ReportTemplate:  "use errors.New($f) or fmt.Errorf(\"%s\", $f) instead",
+					SuggestTemplate: "errors.New($f)",
+					WhereExpr: ir.FilterExpr{
+						Line: 719,
+						Op:   ir.FilterNotOp,
+						Src:  "!m[\"f\"].Const",
+						Args: []ir.FilterExpr{
+							ir.FilterExpr{
+								Line:  719,
+								Op:    ir.FilterVarConstOp,
+								Src:   "m[\"f\"].Const",
+								Value: "f",
+							},
+						},
+					},
+				},
+				ir.Rule{
+					Line: 723,
+					SyntaxPatterns: []ir.PatternString{
+						ir.PatternString{Line: 723, Value: "fmt.Errorf($f($*args))"},
+					},
+					ReportTemplate:  "use errors.New($f($*args)) or fmt.Errorf(\"%s\",$f($*args)) instead",
+					SuggestTemplate: "errors.New($f($*args))",
+				},
+			},
+		},
 	},
 }
 
diff --git a/checkers/testdata/undefinedFormatting/negative_tests.go b/checkers/testdata/undefinedFormatting/negative_tests.go
new file mode 100644
index 000000000..7ffdfced0
--- /dev/null
+++ b/checkers/testdata/undefinedFormatting/negative_tests.go
@@ -0,0 +1,15 @@
+package checker_test
+
+import (
+	"fmt"
+)
+
+var foo = "bar"
+
+func fmtFormatting() {
+	fmt.Errorf("%s", foo)
+	fmt.Errorf("123")
+	fmt.Errorf("%s", fooError())
+}
+
+func fooError() string { return "foo" }
diff --git a/checkers/testdata/undefinedFormatting/positive_tests.go b/checkers/testdata/undefinedFormatting/positive_tests.go
new file mode 100644
index 000000000..5e80c5375
--- /dev/null
+++ b/checkers/testdata/undefinedFormatting/positive_tests.go
@@ -0,0 +1,19 @@
+package checker_test
+
+import (
+	"fmt"
+)
+
+func fmtUndefinedFormatting() {
+	foo := "foo happend"
+	fooFunc := func(k string) (string, string) { return "", "123" }
+	var barFunc = func() string { return "123" }
+	/*! use errors.New(foo) or fmt.Errorf("%s", foo) instead */
+	fmt.Errorf(foo)
+
+	/*! use errors.New(fooFunc("123")) or fmt.Errorf("%s", fooFunc("123")) instead */
+	fmt.Errorf(fooFunc("123"))
+
+	/*! use errors.New(barFunc()) or fmt.Errorf("%s", barFunc()) instead */
+	fmt.Errorf(barFunc())
+}
diff --git a/framework/lintmain/internal/hotload/hotload.go b/framework/lintmain/internal/hotload/hotload.go
index 324d7e78f..5e5567a32 100644
--- a/framework/lintmain/internal/hotload/hotload.go
+++ b/framework/lintmain/internal/hotload/hotload.go
@@ -7,7 +7,7 @@ import (
 	"github.com/go-critic/go-critic/framework/linter"
 )
 
-// CheckersFromDylib loads checkers provided by a dynamic lybrary found under path.
+// CheckersFromDylib loads checkers provided by a dynamic library found under path.
 //
 // The returned info slice must be re-assigned to the original info slice,
 // since there will be new entries there.