diff --git a/CMakeLists.txt b/CMakeLists.txt
index 120f53a40..4e736c6a3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -159,6 +159,18 @@ if(WIN32)
         ${QET_DIR}/qelectrotech.qrc
         ${QET_DIR}/ico/icon-themes.qrc
     )
+    # Our own manifest (it declares longPathAware). MSVC merges a .manifest
+    # listed as a source; MinGW needs it embedded through a resource file,
+    # and ld then keeps it ahead of the toolchain's default manifest.
+    set(QET_MANIFEST_FILE ${QET_DIR}/build-aux/windows/qelectrotech.exe.manifest)
+    if(MSVC)
+        target_sources(${PROJECT_NAME} PRIVATE ${QET_MANIFEST_FILE})
+    else()
+        configure_file(${QET_DIR}/build-aux/windows/qelectrotech-manifest.rc.in
+                       ${CMAKE_CURRENT_BINARY_DIR}/qelectrotech-manifest.rc @ONLY)
+        target_sources(${PROJECT_NAME} PRIVATE
+                       ${CMAKE_CURRENT_BINARY_DIR}/qelectrotech-manifest.rc)
+    endif()
 else()
     add_executable(
         ${PROJECT_NAME}
diff --git a/build-aux/windows/qelectrotech-manifest.rc.in b/build-aux/windows/qelectrotech-manifest.rc.in
new file mode 100644
index 000000000..54304e875
--- /dev/null
+++ b/build-aux/windows/qelectrotech-manifest.rc.in
@@ -0,0 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Embeds qelectrotech.exe.manifest as the program's manifest
+// (resource id 1 = CREATEPROCESS_MANIFEST_RESOURCE_ID, type 24 = RT_MANIFEST).
+1 24 "@QET_MANIFEST_FILE@"
diff --git a/build-aux/windows/qelectrotech.exe.manifest b/build-aux/windows/qelectrotech.exe.manifest
new file mode 100644
index 000000000..1aa9ef544
--- /dev/null
+++ b/build-aux/windows/qelectrotech.exe.manifest
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<!-- SPDX-License-Identifier: GPL-2.0-or-later -->
+<!--
+	Application manifest for QElectroTech.exe, embedded by CMake on Windows.
+	It replaces the toolchain's default manifest, so it repeats what that one
+	declares (supported Windows versions, run as the invoking user) and adds
+	longPathAware: with LongPathsEnabled set in the registry, Windows then
+	lets the program open files whose full path is 260 characters or more.
+-->
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+	<trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+		<security>
+			<requestedPrivileges>
+				<requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+			</requestedPrivileges>
+		</security>
+	</trustInfo>
+	<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+		<application>
+			<!-- Windows 10 and 11 -->
+			<supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+			<!-- Windows 8.1 -->
+			<supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
+			<!-- Windows 8 -->
+			<supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+			<!-- Windows 7 -->
+			<supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+		</application>
+	</compatibility>
+	<application xmlns="urn:schemas-microsoft-com:asm.v3">
+		<windowsSettings>
+			<longPathAware xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">true</longPathAware>
+		</windowsSettings>
+	</application>
+</assembly>