diff --git a/include/site/arm-linux b/include/site/arm-linux
index 7c5773de5..80cc8db28 100644
--- a/include/site/arm-linux
+++ b/include/site/arm-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/armeb-linux b/include/site/armeb-linux
index f93aa6451..c421c51ad 100644
--- a/include/site/armeb-linux
+++ b/include/site/armeb-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/avr32-linux b/include/site/avr32-linux
index f93aa6451..c421c51ad 100644
--- a/include/site/avr32-linux
+++ b/include/site/avr32-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/cris-linux b/include/site/cris-linux
index 7c5773de5..80cc8db28 100644
--- a/include/site/cris-linux
+++ b/include/site/cris-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/i486-linux b/include/site/i486-linux
index 7c5773de5..80cc8db28 100644
--- a/include/site/i486-linux
+++ b/include/site/i486-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/m68k-linux b/include/site/m68k-linux
index 100590259..a2533ded6 100644
--- a/include/site/m68k-linux
+++ b/include/site/m68k-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/mips-linux b/include/site/mips-linux
index f93aa6451..c421c51ad 100644
--- a/include/site/mips-linux
+++ b/include/site/mips-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/mipsel-linux b/include/site/mipsel-linux
index 7c5773de5..80cc8db28 100644
--- a/include/site/mipsel-linux
+++ b/include/site/mipsel-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/powerpc-linux b/include/site/powerpc-linux
index f93aa6451..c421c51ad 100644
--- a/include/site/powerpc-linux
+++ b/include/site/powerpc-linux
@@ -10,7 +10,7 @@ ac_cv_sizeof_int64_t=8
 ac_cv_sizeof_long_int=4
 ac_cv_sizeof_long_long=8
 ac_cv_sizeof_long=4
-ac_cv_sizeof_off_t=4
+ac_cv_sizeof_off_t=8
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4