--- a/galerautils/src/gu_arch.h
+++ b/galerautils/src/gu_arch.h
@@ -50,8 +50,9 @@
 #elif defined(__APPLE__) || defined(__FreeBSD__)
 # include <stdint.h>
 # define GU_WORDSIZE __WORDSIZE
-#else
-# include <bits/wordsize.h>
+#else /* use this instead of bits/wordsize.h */
+# include <stdint.h>
+# include <bits/user.h>
 # define GU_WORDSIZE __WORDSIZE
 #endif