diff --git a/cmd/postgres_exporter/postgres_exporter.go b/cmd/postgres_exporter/postgres_exporter.go
index 7ecab7c2..e78c9b87 100644
--- a/cmd/postgres_exporter/postgres_exporter.go
+++ b/cmd/postgres_exporter/postgres_exporter.go
@@ -708,7 +708,7 @@ func parseFingerprint(url string) (string, error) {
 	pairs := strings.Split(dsn, " ")
 	kv := make(map[string]string, len(pairs))
 	for _, pair := range pairs {
-		splitted := strings.Split(pair, "=")
+		splitted := strings.SplitN(pair, "=", 2)
 		if len(splitted) != 2 {
 			return "", fmt.Errorf("malformed dsn %q", dsn)
 		}
diff --git a/cmd/postgres_exporter/postgres_exporter_test.go b/cmd/postgres_exporter/postgres_exporter_test.go
index 63cbbd8e..5a0529b6 100644
--- a/cmd/postgres_exporter/postgres_exporter_test.go
+++ b/cmd/postgres_exporter/postgres_exporter_test.go
@@ -193,6 +193,10 @@ func (s *FunctionalSuite) TestParseFingerprint(c *C) {
 			url:         "postgresql://userDsn:passwordDsn@localhost:55432/?sslmode=disabled",
 			fingerprint: "localhost:55432",
 		},
+		{
+			url:         "postgresql://userDsn:passwordDsn%3D@localhost:55432/?sslmode=disabled",
+			fingerprint: "localhost:55432",
+		},
 		{
 			url:         "port=1234",
 			fingerprint: "localhost:1234",