diff --git a/bindings/java/src/jni/generate.pl b/bindings/java/src/jni/generate.pl
index 0755faa8..7dada57e 100644
--- a/bindings/java/src/jni/generate.pl
+++ b/bindings/java/src/jni/generate.pl
@@ -200,11 +200,6 @@ my %classes = (
          desc => 'Time since machine started in seconds',
          plat => '*'
       },
-      {
-         name => 'idletime', type => 'Double',
-         desc => 'Time machine spent idle since start',
-         plat => 'L'
-      },
     ],
     ProcMem => [
       {
diff --git a/include/sigar.h b/include/sigar.h
index 74d943b3..a93d9a61 100644
--- a/include/sigar.h
+++ b/include/sigar.h
@@ -135,7 +135,6 @@ sigar_cpu_info_list_destroy(sigar_t *sigar,
 
 typedef struct {
     double uptime;
-    double idletime;
 } sigar_uptime_t;
 
 SIGAR_DECLARE(int) sigar_uptime_get(sigar_t *sigar,
diff --git a/src/os/aix/aix_sigar.c b/src/os/aix/aix_sigar.c
index c0d8b90e..bfdc55c2 100644
--- a/src/os/aix/aix_sigar.c
+++ b/src/os/aix/aix_sigar.c
@@ -803,7 +803,6 @@ int sigar_uptime_get(sigar_t *sigar,
     }
 
     uptime->uptime = time(NULL) - sigar->boot_time;
-    uptime->idletime = -1;
 
     return SIGAR_OK;
 }
diff --git a/src/os/hpux/hpux_sigar.c b/src/os/hpux/hpux_sigar.c
index 02bed416..ab155776 100644
--- a/src/os/hpux/hpux_sigar.c
+++ b/src/os/hpux/hpux_sigar.c
@@ -152,7 +152,6 @@ int sigar_uptime_get(sigar_t *sigar,
                      sigar_uptime_t *uptime)
 {
     uptime->uptime = time(NULL) - sigar->pstatic.boot_time;
-    uptime->idletime = 0; /*XXX*/;
 
     return SIGAR_OK;
 }
diff --git a/src/os/linux/linux_sigar.c b/src/os/linux/linux_sigar.c
index b2c4b4b4..ff9957a2 100644
--- a/src/os/linux/linux_sigar.c
+++ b/src/os/linux/linux_sigar.c
@@ -346,7 +346,6 @@ int sigar_uptime_get(sigar_t *sigar,
     }
 
     uptime->uptime   = strtod(buffer, &ptr);
-    uptime->idletime = strtod(ptr, &ptr);
 
     return SIGAR_OK;
 }
diff --git a/src/os/solaris/solaris_sigar.c b/src/os/solaris/solaris_sigar.c
index 4830079f..bdfe92d0 100644
--- a/src/os/solaris/solaris_sigar.c
+++ b/src/os/solaris/solaris_sigar.c
@@ -358,8 +358,6 @@ int sigar_cpu_list_get(sigar_t *sigar, sigar_cpu_list_t *cpulist)
 int sigar_uptime_get(sigar_t *sigar,
                      sigar_uptime_t *uptime)
 {
-    uptime->idletime = 0; /*XXX*/
-
     if (sigar->boot_time) {
         uptime->uptime = time(NULL) - sigar->boot_time;
     }
diff --git a/src/os/stub/stub_sigar.c b/src/os/stub/stub_sigar.c
index e634f641..fecc42fa 100644
--- a/src/os/stub/stub_sigar.c
+++ b/src/os/stub/stub_sigar.c
@@ -63,7 +63,6 @@ int sigar_uptime_get(sigar_t *sigar,
                      sigar_uptime_t *uptime)
 {
     uptime->uptime   = -1;
-    uptime->idletime = -1;
 
     return SIGAR_OK;
 }
diff --git a/src/os/win32/win32_sigar.c b/src/os/win32/win32_sigar.c
index a299c4f8..5179c95d 100644
--- a/src/os/win32/win32_sigar.c
+++ b/src/os/win32/win32_sigar.c
@@ -407,7 +407,6 @@ SIGAR_DECLARE(int) sigar_cpu_list_get(sigar_t *sigar, sigar_cpu_list_t *cpulist)
 SIGAR_DECLARE(int) sigar_uptime_get(sigar_t *sigar,
                                     sigar_uptime_t *uptime)
 {
-    uptime->idletime = 0;
     uptime->uptime = GetTickCount() / 1000;
     return SIGAR_OK;
 }