diff --git a/vlib/compiler/cheaders.v b/vlib/compiler/cheaders.v
index 6b5cfa9215..f2bd170659 100644
--- a/vlib/compiler/cheaders.v
+++ b/vlib/compiler/cheaders.v
@@ -23,6 +23,9 @@ CommonCHeaders = '
 #endif
 #endif
 
+#if defined(__CYGWIN__) && !defined(_WIN32)
+#error Cygwin is not supported, please use MinGW or Visual Studio.
+#endif
 
 #ifdef __linux__
 #include <sys/types.h>