diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index d1afddb2..3e2d6098 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -45,6 +45,7 @@ Other Changes:
 - Window: Fix IsWindowAppearing() from returning true twice in most cases. (#3982, #1497, #1061)
 - Nav: Fixed using SetItemDefaultFocus() on windows with _NavFlattened flag.
 - Nav: Fixed toggling menu layer while an InputText() is active not stealing active id.
+- Nav, InputText: Fixed accidental menu toggling while typing non-ascii characters using AltGR. [@rokups] (#370)
 - Tables: Expose TableSetColumnEnabled() in public api. (#3935)
 - Tables: Better preserve widths when columns count changes. (#4046)
 - TabBar: Fixed mouse reordering with very fast movements (e.g. crossing multiple tabs in a single
diff --git a/imgui.cpp b/imgui.cpp
index 4d3abac2..cad4922b 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -9039,8 +9039,16 @@ static void ImGui::NavUpdate()
             io.NavInputs[ImGuiNavInput_TweakSlow] = 1.0f;
         if (io.KeyShift)
             io.NavInputs[ImGuiNavInput_TweakFast] = 1.0f;
-        if (io.KeyAlt && !io.KeyCtrl) // AltGR is Alt+Ctrl, also even on keyboards without AltGR we don't want Alt+Ctrl to open menu.
+
+        // AltGR is normally Alt+Ctrl but we can't reliably detect it (not all backends/systems/layout emit it as Alt+Ctrl)
+        // But also even on keyboards without AltGR we don't want Alt+Ctrl to open menu anyway.
+        if (io.KeyAlt && !io.KeyCtrl)
             io.NavInputs[ImGuiNavInput_KeyMenu_]  = 1.0f;
+
+        // We automatically cancel toggling nav layer when any text has been typed while holding Alt. (See #370)
+        if (io.KeyAlt && !io.KeyCtrl && g.NavWindowingToggleLayer && io.InputQueueCharacters.Size > 0)
+            g.NavWindowingToggleLayer = false;
+
         #undef NAV_MAP_KEY
     }
     memcpy(io.NavInputsDownDurationPrev, io.NavInputsDownDuration, sizeof(io.NavInputsDownDuration));