diff --git a/common.go b/common.go
index 520d12b..6f9ff2f 100644
--- a/common.go
+++ b/common.go
@@ -1,7 +1,9 @@
 package repostatus
 
 import (
+	"errors"
 	"os"
+	"path/filepath"
 	"strings"
 	"unicode"
 
@@ -59,18 +61,40 @@ func (rs *RepoStatus) IsPrimitive() bool {
 	return false
 }
 
-func (rs *RepoStatus) IsProtobuf() (bool, []string, []string, error) {
+func (rs *RepoStatus) IsProtobuf() (bool, []string, error) {
 	log.Info("are there .proto files in:", rs.Path())
-	all, compiled, err := ScanForProtobuf(rs.Path())
-	var found bool = false
-	for i, s := range all {
-		log.Info("found i, s:", i, s)
-		found = true
+	fullp, fullc, err := ScanForProtobuf(rs.Path())
+	protos := make(map[string]string)
+	protoc := make(map[string]string)
+	var anyfound bool = false
+	var allc []string
+	for _, s := range fullp {
+		filebase := filepath.Base(s)
+		name := strings.TrimSuffix(filebase, ".proto")
+		// log.Info("found i, s:", i, name, filebase)
+		anyfound = true
+		protos[name] = s
 	}
-	for i, s := range compiled {
-		log.Info("found compiled i, s:", i, s)
+	for pname, _ := range protos {
+		var found bool = false
+		for _, s := range fullc {
+			cfilebase := filepath.Base(s)
+			cname := strings.TrimSuffix(cfilebase, ".pb.go")
+			// log.Info("found compiled i, s:", i, cname, cfilebase)
+			protoc[cname] = s
+			if cname == pname {
+				found = true
+				allc = append(allc, cfilebase)
+			}
+		}
+		if found {
+			// log.Info("found ok")
+		} else {
+			log.Info("not found")
+			err = errors.New("compiled file " + pname + ".pb.go missing")
+		}
 	}
-	return found, all, compiled, err
+	return anyfound, allc, err
 }
 
 // returns the filesystem path to the repo