diff --git a/src/os/darwin/darwin_sigar.c b/src/os/darwin/darwin_sigar.c
index 2aa5d7fe..03d69d74 100644
--- a/src/os/darwin/darwin_sigar.c
+++ b/src/os/darwin/darwin_sigar.c
@@ -807,6 +807,9 @@ int sigar_proc_mem_get(sigar_t *sigar, sigar_pid_t pid,
     procmem->share = shared;
     procmem->vsize = vsize;
     procmem->resident = resident;
+    procmem->page_faults  = SIGAR_FIELD_NOTIMPL;
+    procmem->minor_faults = SIGAR_FIELD_NOTIMPL;
+    procmem->major_faults = SIGAR_FIELD_NOTIMPL;
 
     return SIGAR_OK;
 #else
@@ -825,6 +828,10 @@ int sigar_proc_mem_get(sigar_t *sigar, sigar_pid_t pid,
 
     procmem->share = SIGAR_FIELD_NOTIMPL;
 
+    procmem->page_faults  = SIGAR_FIELD_NOTIMPL;
+    procmem->minor_faults = SIGAR_FIELD_NOTIMPL;
+    procmem->major_faults = SIGAR_FIELD_NOTIMPL;
+
     return SIGAR_OK;
 #endif
 }
diff --git a/src/os/netware/netware_sigar.c b/src/os/netware/netware_sigar.c
index 0af5d3b7..2ee9e6ce 100644
--- a/src/os/netware/netware_sigar.c
+++ b/src/os/netware/netware_sigar.c
@@ -179,6 +179,9 @@ int sigar_proc_mem_get(sigar_t *sigar, sigar_pid_t pid,
     procmem->share = -1;
     procmem->rss = -1;
     procmem->resident = -1;
+    procmem->page_faults  = -1;
+    procmem->minor_faults = -1;
+    procmem->major_faults = -1;
 
     return SIGAR_OK;
 }
diff --git a/src/os/osf1/osf1_sigar.c b/src/os/osf1/osf1_sigar.c
index 35c30371..b2d010bf 100644
--- a/src/os/osf1/osf1_sigar.c
+++ b/src/os/osf1/osf1_sigar.c
@@ -228,6 +228,10 @@ int sigar_proc_mem_get(sigar_t *sigar, sigar_pid_t pid,
     /*XXX*/
     procmem->size = 1; /* 1 == let ant test pass for now */
 
+    procmem->page_faults  = SIGAR_FIELD_NOTIMPL;
+    procmem->minor_faults = SIGAR_FIELD_NOTIMPL;
+    procmem->major_faults = SIGAR_FIELD_NOTIMPL;
+
     return SIGAR_OK;
 }
 
diff --git a/src/os/stub/stub_sigar.c b/src/os/stub/stub_sigar.c
index db3d5217..6dee8a61 100644
--- a/src/os/stub/stub_sigar.c
+++ b/src/os/stub/stub_sigar.c
@@ -101,6 +101,9 @@ int sigar_proc_mem_get(sigar_t *sigar, sigar_pid_t pid,
     procmem->share = -1;
     procmem->rss = -1;
     procmem->resident = -1;
+    procmem->page_faults  = -1;
+    procmem->minor_faults = -1;
+    procmem->major_faults = -1;
 
     return SIGAR_OK;
 }