diff --git a/CMakeLists.txt b/CMakeLists.txt
index 16ee4d5d..163e92a1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1370,7 +1370,7 @@ else()
     target_compile_definitions(liblzma PRIVATE HAVE_VISIBILITY=0)
 endif()
 
-if(WIN32)
+if(WIN32 OR CYGWIN)
     if(BUILD_SHARED_LIBS)
         # Add the Windows resource file for liblzma.dll.
         target_sources(liblzma PRIVATE src/liblzma/liblzma_w32res.rc)
@@ -1382,8 +1382,12 @@ if(WIN32)
         # Export the public API symbols with __declspec(dllexport).
         target_compile_definitions(liblzma PRIVATE DLL_EXPORT)
 
-        if(NOT MSVC)
-            # Create a DEF file. The linker puts the ordinal numbers there
+        if(NOT MSVC AND NOT CYGWIN)
+            # Create a DEF file. The Autotools-based build creates a DEF file
+            # under Cygwin & MSYS2 too but it almost certainly is a useless
+            # file in that context, so the CMake build omits it.
+            #
+            # The linker puts the ordinal numbers in the DEF file
             # too so the output from the linker isn't our final file.
             target_link_options(liblzma PRIVATE
                                 "-Wl,--output-def,liblzma.def.in")
@@ -1848,7 +1852,7 @@ if(HAVE_DECODERS)
 
         target_link_libraries("${XZDEC}" PRIVATE liblzma libgnu)
 
-        if(WIN32)
+        if(WIN32 OR CYGWIN)
             # Add the Windows resource file for xzdec.exe or lzmadec.exe.
             target_sources("${XZDEC}" PRIVATE "src/xzdec/${XZDEC}_w32res.rc")
             set_source_files_properties(
@@ -1917,7 +1921,7 @@ if(XZ_TOOL_LZMAINFO AND HAVE_DECODERS)
 
     target_link_libraries(lzmainfo PRIVATE liblzma libgnu)
 
-    if(WIN32)
+    if(WIN32 OR CYGWIN)
         # Add the Windows resource file for lzmainfo.exe.
         target_sources(lzmainfo PRIVATE src/lzmainfo/lzmainfo_w32res.rc)
         set_source_files_properties(src/lzmainfo/lzmainfo_w32res.rc PROPERTIES
@@ -2030,7 +2034,7 @@ if(XZ_TOOL_XZ)
 this many MiB of RAM if xz cannot determine the amount at runtime")
     target_compile_definitions(xz PRIVATE "ASSUME_RAM=${XZ_ASSUME_RAM}")
 
-    if(WIN32)
+    if(WIN32 OR CYGWIN)
         # Add the Windows resource file for xz.exe.
         target_sources(xz PRIVATE src/xz/xz_w32res.rc)
         set_source_files_properties(src/xz/xz_w32res.rc PROPERTIES