diff --git a/src/tools/generator.cpp b/src/tools/generator.cpp
--- a/src/tools/generator.cpp
+++ b/src/tools/generator.cpp
@@ -428,7 +428,7 @@
         if (std::any_of(m_interfaces.constBegin(), m_interfaces.constEnd(), [] (const Interface &i) { return i.isUnstableInterface(); })) {
             // generate the unstable semantic version
             auto it = std::find_if(m_interfaces.constBegin(), m_interfaces.constEnd(), [] (const Interface &i) { return i.isGlobal(); });
-            if (it != m_interfaces.constEnd()) {
+            while (it != m_interfaces.constEnd()) {
                 const QString templateString = QStringLiteral(
 "/**\n"
 " * Enum describing the interface versions the %1 can support.\n"
@@ -444,6 +444,7 @@
                 *m_stream.localData() << templateString.arg((*it).kwaylandServerName())
                                                        .arg((*it).name())
                                                        .arg((*it).name().mid((*it).name().lastIndexOf(QStringLiteral("_v")) + 2));
+                ++it;
             }
         }
         for (auto it = m_interfaces.constBegin(); it != m_interfaces.constEnd(); ++it) {