diff --git a/client/TracyCallstack.cpp b/client/TracyCallstack.cpp
index b3ad73f6..6981f8c0 100644
--- a/client/TracyCallstack.cpp
+++ b/client/TracyCallstack.cpp
@@ -2,7 +2,7 @@
 
 #ifdef TRACY_HAS_CALLSTACK
 
-#ifdef _WIN32
+#if defined _WIN32 || defined __CYGWIN__
 #  ifndef MAXLONG
 enum { SYMOPT_LOAD_LINES = 0x00000010 };
 typedef struct _SYMBOL_INFO
diff --git a/client/TracyCallstack.hpp b/client/TracyCallstack.hpp
index 9c6efedb..7322b704 100644
--- a/client/TracyCallstack.hpp
+++ b/client/TracyCallstack.hpp
@@ -1,10 +1,14 @@
 #ifndef __TRACYCALLSTACK_HPP__
 #define __TRACYCALLSTACK_HPP__
 
-#ifdef _WIN32
+#if defined _WIN32 || defined __CYGWIN__
 #  define TRACY_HAS_CALLSTACK
 #  ifndef MAXLONG
+#    ifdef __CYGWIN__
+extern "C" __declspec(dllimport) unsigned short __stdcall RtlCaptureStackBackTrace( unsigned int, unsigned int, void**, unsigned int* );
+#    else
 extern "C" __declspec(dllimport) unsigned short __stdcall RtlCaptureStackBackTrace( unsigned long, unsigned long, void**, unsigned long* );
+#    endif
 #  endif
 #endif
 
@@ -27,7 +31,7 @@ struct CallstackEntry
     uint32_t line;
 };
 
-#ifdef _WIN32
+#if defined _WIN32 || defined __CYGWIN__
 
 void InitCallstack();
 CallstackEntry DecodeCallstackPtr( uint64_t ptr );