diff --git a/README.md b/README.md
index 2b917e2e..90263c32 100644
--- a/README.md
+++ b/README.md
@@ -123,6 +123,8 @@ Run:
     $ ./gyp_uv.py -f make
     $ make -C out
 
+Run `./gyp_uv.py -f make -Dtarget_arch=x32` to build [x32][] binaries.
+
 ### OS X
 
 Run:
diff --git a/common.gypi b/common.gypi
index a0e0eea0..a8e2ef44 100644
--- a/common.gypi
+++ b/common.gypi
@@ -143,6 +143,10 @@
             'cflags': [ '-m32' ],
             'ldflags': [ '-m32' ],
           }],
+          [ 'target_arch=="x32"', {
+            'cflags': [ '-mx32' ],
+            'ldflags': [ '-mx32' ],
+          }],
           [ 'OS=="linux"', {
             'cflags': [ '-ansi' ],
           }],