diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -495,7 +495,8 @@
         #
 
         # array objects
-        exts.append( Extension('array', ['arraymodule.c']) )
+        exts.append( Extension('array', ['arraymodule.c'],
+                               depends=['structmember.h']) )
         # complex math library functions
         exts.append( Extension('cmath', ['cmathmodule.c', '_math.c'],
                                depends=['_math.h'],