diff --git a/ChangeLog b/ChangeLog
index 54002cb50fb..1d352151272 100755
--- a/ChangeLog
+++ b/ChangeLog
@@ -10466,3 +10466,12 @@
 	  list AND the device event list.  Thus each socket type can
 	  received both custom data-related events as well as common
 	  device related events (2015-05-28).
+	* net/socket and net/utils: setsockopt() fails when setting timeouts
+	  to values less that an 100 msec.  That is because the timeout is
+	  limited to stops of 1 decisecond and because the conversion of
+	  structure timeval was truncating the microsecond remainder.  The
+	  utility net_timeval2dsec now accespts and option to determin how it
+	  handles the remainder:  truncate, discarding the remainder, use the
+	  remainder to round to the closed decisecond value, or use any non-zero
+	  remainder to the next larger whole decisecond value.  Bug discovered
+	  by Librae (2015-05-29).
diff --git a/net/socket/setsockopt.c b/net/socket/setsockopt.c
index 61e502ddfd8..cc6d15dec9e 100644
--- a/net/socket/setsockopt.c
+++ b/net/socket/setsockopt.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * net/socket/setsockopt.c
  *
- *   Copyright (C) 2007, 2008, 2011-2012, 2014 Gregory Nutt. All rights
+ *   Copyright (C) 2007, 2008, 2011-2012, 2014-2015 Gregory Nutt. All rights
  *     reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
@@ -173,19 +173,22 @@ int psock_setsockopt(FAR struct socket *psock, int level, int option,
       case SO_RCVTIMEO:
       case SO_SNDTIMEO:
         {
+          FAR struct timeval *tv = (FAR struct timeval *)value;
           socktimeo_t timeo;
 
           /* Verify that option is the size of an 'struct timeval'. */
 
-          if (value_len != sizeof(struct timeval))
+          if (tv == NULL || value_len != sizeof(struct timeval))
             {
               err = EINVAL;
               goto errout;
             }
 
-          /* Get the timeout value */
+          /* Get the timeout value.  Any microsecond remainder will be
+           * force to the next larger, whole decisecond value.
+           */
 
-          timeo = (socktimeo_t)net_timeval2dsec((struct timeval *)value);
+          timeo = (socktimeo_t)net_timeval2dsec(tv, TV2DS_CEIL);
 
           /* Save the timeout value */
 
diff --git a/net/utils/net_timeval2dsec.c b/net/utils/net_timeval2dsec.c
index b4beaf4eff2..a08a17e964f 100644
--- a/net/utils/net_timeval2dsec.c
+++ b/net/utils/net_timeval2dsec.c
@@ -1,7 +1,7 @@
 /****************************************************************************
  * net/utils/net_timeval2dsec.c
  *
- *   Copyright (C) 2007, 2008, 2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2007, 2008, 2014-2015 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -57,7 +57,8 @@
  *   save new timeout values.
  *
  * Parameters:
- *   tv   The struct timeval to convert
+ *   tv        - The struct timeval to convert
+ *   remainder - Determines how to handler the microsecond remainder
  *
  * Returned Value:
  *   The converted value
@@ -66,7 +67,26 @@
  *
  ****************************************************************************/
 
-unsigned int net_timeval2dsec(struct timeval *tv)
+unsigned int net_timeval2dsec(FAR struct timeval *tv,
+                              enum tv2ds_remainder_e remainder)
 {
-  return (unsigned int)(tv->tv_sec * DSEC_PER_SEC + tv->tv_usec / USEC_PER_DSEC);
+  unsigned long adjust = 0;
+
+  switch (remainder)
+    {
+    default:
+    case TV2DS_TRUNC: /* Truncate microsecond remainder */
+      break;
+
+    case TV2DS_ROUND: /* Round to the nearest full decisecond */
+      adjust = (USEC_PER_DSEC / 2);
+      break;
+
+    case TV2DS_CEIL:  /* Force to next larger full decisecond */
+      adjust = (USEC_PER_DSEC - 1);
+      break;
+    }
+
+  return (unsigned int)(tv->tv_sec * DSEC_PER_SEC +
+                       (tv->tv_usec + adjust) / USEC_PER_DSEC);
 }
diff --git a/net/utils/utils.h b/net/utils/utils.h
index 3322f868bf4..951caf8d595 100644
--- a/net/utils/utils.h
+++ b/net/utils/utils.h
@@ -1,7 +1,7 @@
 /****************************************************************************
  * net/utils/utils.h
  *
- *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -51,6 +51,15 @@
  * Public Types
  ****************************************************************************/
 
+/* These values control the behavior of net_timeval2desc */
+
+enum tv2ds_remainder_e
+{
+  TV2DS_TRUNC = 0, /* Truncate microsecond remainder */
+  TV2DS_ROUND,     /* Round to the nearest full decisecond */
+  TV2DS_CEIL       /* Force to next larger full decisecond */
+};
+
 /****************************************************************************
  * Public Data
  ****************************************************************************/
@@ -128,7 +137,8 @@ unsigned int net_dsec2tick(int dsec);
  *   save new timeout values.
  *
  * Parameters:
- *   tv   The struct timeval to convert
+ *   tv        - The struct timeval to convert
+ *   remainder - Determines how to handler the microsecond remainder
  *
  * Returned Value:
  *   The converted value
@@ -137,7 +147,8 @@ unsigned int net_dsec2tick(int dsec);
  *
  ****************************************************************************/
 
-unsigned int net_timeval2dsec(FAR struct timeval *tv);
+unsigned int net_timeval2dsec(FAR struct timeval *tv,
+                              enum tv2ds_remainder_e remainder);
 
 /****************************************************************************
  * Function: net_ipv6_pref2mask