diff --git a/sysdeps/unix/sysv/linux/alpha/bits/types.h b/sysdeps/unix/sysv/linux/alpha/bits/types.h
index 276236d4f5..d4f2217f05 100644
--- a/sysdeps/unix/sysv/linux/alpha/bits/types.h
+++ b/sysdeps/unix/sysv/linux/alpha/bits/types.h
@@ -110,6 +110,9 @@ typedef struct
 typedef int __t_scalar_t;
 typedef unsigned int __t_uscalar_t;
 
+/* Duplicates info from stdint.h but this is used in unistd.h.  */
+typedef long int __intptr_t;
+
 
 /* Now add the thread types.  */
 #include <bits/pthreadtypes.h>
diff --git a/sysdeps/unix/sysv/linux/mips/bits/types.h b/sysdeps/unix/sysv/linux/mips/bits/types.h
index 313e96b480..2bb8a2a9c6 100644
--- a/sysdeps/unix/sysv/linux/mips/bits/types.h
+++ b/sysdeps/unix/sysv/linux/mips/bits/types.h
@@ -134,6 +134,9 @@ typedef __loff_t __off64_t;
 typedef int __t_scalar_t;
 typedef unsigned int __t_uscalar_t;
 
+/* Duplicates info from stdint.h but this is used in unistd.h.  */
+typedef int __intptr_t;
+
 
 /* Now add the thread types.  */
 #include <bits/pthreadtypes.h>
diff --git a/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h b/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h
index 44e343ab1c..e25dec98fb 100644
--- a/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h
+++ b/sysdeps/unix/sysv/sysv4/solaris2/bits/types.h
@@ -115,4 +115,7 @@ typedef __u_quad_t __fsfilcnt64_t;
 typedef int __t_scalar_t;
 typedef unsigned int __t_uscalar_t;
 
+/* Duplicates info from stdint.h but this is used in unistd.h.  */
+typedef long int __intptr_t;
+
 #endif /* bits/types.h */