diff --git a/src/Window.cpp b/src/Window.cpp
index 85608f6f..8bc16f1b 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -689,6 +689,8 @@ void CWindow::applyDynamicRule(const SWindowRule& r) {
             Debug::log(ERR, "Rule idleinhibit: unknown mode {}", IDLERULE);
     } else if (r.szRule.starts_with("maxsize")) {
         try {
+            if (!m_bIsFloating)
+                return;
             m_sAdditionalConfigData.maxSize = configStringToVector2D(r.szRule.substr(8));
             m_vRealSize                     = Vector2D(std::min((double)m_sAdditionalConfigData.maxSize.toUnderlying().x, m_vRealSize.goal().x),
                                                        std::min((double)m_sAdditionalConfigData.maxSize.toUnderlying().y, m_vRealSize.goal().y));
@@ -697,6 +699,8 @@ void CWindow::applyDynamicRule(const SWindowRule& r) {
         } catch (std::exception& e) { Debug::log(ERR, "maxsize rule \"{}\" failed with: {}", r.szRule, e.what()); }
     } else if (r.szRule.starts_with("minsize")) {
         try {
+            if (!m_bIsFloating)
+                return;
             m_sAdditionalConfigData.minSize = configStringToVector2D(r.szRule.substr(8));
             m_vRealSize                     = Vector2D(std::max((double)m_sAdditionalConfigData.minSize.toUnderlying().x, m_vRealSize.goal().x),
                                                        std::max((double)m_sAdditionalConfigData.minSize.toUnderlying().y, m_vRealSize.goal().y));