diff --git a/classes/semver.js b/classes/semver.js
index 92254be1..54381272 100644
--- a/classes/semver.js
+++ b/classes/semver.js
@@ -6,6 +6,22 @@ const { safeRe: re, t } = require('../internal/re')
 
 const parseOptions = require('../internal/parse-options')
 const { compareIdentifiers } = require('../internal/identifiers')
+
+const isPrereleaseIdentifier = (prerelease, identifier) => {
+  const identifiers = identifier.split('.')
+  if (identifiers.length > prerelease.length) {
+    return false
+  }
+
+  for (let i = 0; i < identifiers.length; i++) {
+    if (compareIdentifiers(prerelease[i], identifiers[i]) !== 0) {
+      return false
+    }
+  }
+
+  return true
+}
+
 class SemVer {
   constructor (version, options) {
     options = parseOptions(options)
@@ -309,8 +325,9 @@ class SemVer {
           if (identifierBase === false) {
             prerelease = [identifier]
           }
-          if (compareIdentifiers(this.prerelease[0], identifier) === 0) {
-            if (isNaN(this.prerelease[1])) {
+          if (isPrereleaseIdentifier(this.prerelease, identifier)) {
+            const prereleaseBase = this.prerelease[identifier.split('.').length]
+            if (isNaN(prereleaseBase)) {
               this.prerelease = prerelease
             }
           } else {
diff --git a/test/fixtures/increments.js b/test/fixtures/increments.js
index bcb582ab..31ea6974 100644
--- a/test/fixtures/increments.js
+++ b/test/fixtures/increments.js
@@ -31,6 +31,9 @@ module.exports = [
   ['1.2.3-alpha.10.beta.0', 'prerelease', '1.2.3-alpha.10.beta.1'],
   ['1.2.3-alpha.10.beta.1', 'prerelease', '1.2.3-alpha.10.beta.2'],
   ['1.2.3-alpha.10.beta.2', 'prerelease', '1.2.3-alpha.10.beta.3'],
+  ['3.0.0-alpha.beta.5.4', 'prerelease', '3.0.0-alpha.beta.5.5', false, 'alpha.beta'],
+  ['3.0.0-alpha.beta.5.4', 'prerelease', '3.0.0-alpha.beta.5.5', false, 'alpha.beta.5'],
+  ['3.0.0-alpha.beta.gamma', 'prerelease', '3.0.0-alpha.beta.0', false, 'alpha.beta'],
   ['1.2.3-alpha.9.beta', 'prerelease', '1.2.3-alpha.10.beta'],
   ['1.2.3-alpha.10.beta', 'prerelease', '1.2.3-alpha.11.beta'],
   ['1.2.3-alpha.11.beta', 'prerelease', '1.2.3-alpha.12.beta'],
@@ -77,6 +80,9 @@ module.exports = [
   ['1.2.3-alpha.10.beta.0', 'prerelease', '1.2.3-alpha.10.beta.1', false, 'alpha'],
   ['1.2.3-alpha.10.beta.1', 'prerelease', '1.2.3-alpha.10.beta.2', false, 'alpha'],
   ['1.2.3-alpha.10.beta.2', 'prerelease', '1.2.3-alpha.10.beta.3', false, 'alpha'],
+  ['3.0.0-alpha.beta.5.4', 'prerelease', '3.0.0-alpha.beta.5.5', false, 'alpha.beta'],
+  ['3.0.0-alpha.beta.5.4', 'prerelease', '3.0.0-alpha.beta.5.5', false, 'alpha.beta.5'],
+  ['3.0.0-alpha.beta.gamma', 'prerelease', '3.0.0-alpha.beta.0', false, 'alpha.beta'],
   ['1.2.3-alpha.9.beta', 'prerelease', '1.2.3-dev.0', false, 'dev'],
   ['1.2.3-alpha.9.beta', 'prerelease', '1.2.3-alpha.10.beta', false, 'alpha'],
   ['1.2.3-alpha.10.beta', 'prerelease', '1.2.3-alpha.11.beta', false, 'alpha'],