diff --git a/Supported-Platforms.md b/Supported-Platforms.md
index bfc4f82..22bba2a 100644
--- a/Supported-Platforms.md
+++ b/Supported-Platforms.md
@@ -15,4 +15,13 @@ Currently, mruby compiles and runs under the platforms reported hereafter.
 |unknown  |Win7               |Unknown      |MinGW64            |YES     |
 |3e1dd77b |OpenSUSE 12.2      |Intel i5-2410|GCC 4.7            |YES     |
 |3e1dd77b |OpenSUSE 12.2      |Intel i5-2410|Solaris Studio 12.3|NO      |
-|75dd4a5a |Win XP / Cygwin    |Q6600        |GCC + Android NDK  |YES     |
\ No newline at end of file
+|75dd4a5a |Win XP / Cygwin    |Q6600        |GCC + Android NDK  |YES     |
+
+## Building on Cygwin ## 
+Building on Cygwin is not well supported, because of the way paths are treated (slash vs. backslash, /cygdrive/c/ vs. C:\, etc.) However, some users successfully built under Cygwin.
+
+The key is to set up the NDK environment like so:
+
+```export ANDROID_STANDALONE_TOOLCHAIN=\`cygpath -w /tmp/android-14-toolchain\```
+
+After this, it should build if you run `make`.