diff --git a/include/site/arm-linux-uclibc b/include/site/arm-linux-uclibc
index 8bd8b786d..02c9f888c 100644
--- a/include/site/arm-linux-uclibc
+++ b/include/site/arm-linux-uclibc
@@ -12,7 +12,7 @@ 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=8
+ac_cv_sizeof_off_t=4
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/armeb-linux-uclibc b/include/site/armeb-linux-uclibc
index 5ea25159a..f0ec10b76 100644
--- a/include/site/armeb-linux-uclibc
+++ b/include/site/armeb-linux-uclibc
@@ -12,7 +12,7 @@ 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=8
+ac_cv_sizeof_off_t=4
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/avr32-linux-uclibc b/include/site/avr32-linux-uclibc
index 5ea25159a..f0ec10b76 100644
--- a/include/site/avr32-linux-uclibc
+++ b/include/site/avr32-linux-uclibc
@@ -12,7 +12,7 @@ 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=8
+ac_cv_sizeof_off_t=4
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/i386-linux-uclibc b/include/site/i386-linux-uclibc
index 8bd8b786d..02c9f888c 100644
--- a/include/site/i386-linux-uclibc
+++ b/include/site/i386-linux-uclibc
@@ -12,7 +12,7 @@ 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=8
+ac_cv_sizeof_off_t=4
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/mips-linux-uclibc b/include/site/mips-linux-uclibc
index 5ea25159a..f0ec10b76 100644
--- a/include/site/mips-linux-uclibc
+++ b/include/site/mips-linux-uclibc
@@ -12,7 +12,7 @@ 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=8
+ac_cv_sizeof_off_t=4
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/mipsel-linux-uclibc b/include/site/mipsel-linux-uclibc
index 8bd8b786d..02c9f888c 100644
--- a/include/site/mipsel-linux-uclibc
+++ b/include/site/mipsel-linux-uclibc
@@ -12,7 +12,7 @@ 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=8
+ac_cv_sizeof_off_t=4
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4
diff --git a/include/site/powerpc-linux-uclibc b/include/site/powerpc-linux-uclibc
index 5ea25159a..f0ec10b76 100644
--- a/include/site/powerpc-linux-uclibc
+++ b/include/site/powerpc-linux-uclibc
@@ -12,7 +12,7 @@ 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=8
+ac_cv_sizeof_off_t=4
 ac_cv_sizeof_short_int=2
 ac_cv_sizeof_short=2
 ac_cv_sizeof_size_t=4