diff --git a/CHANGES b/CHANGES
index 427de7098b..5f73bfa690 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,8 @@
 
+2.6-576 | 2019-07-10 18:38:54 -0700
+
+  * Remove unused option: chunked_io_buffer_soft_cap (Jon Siwek, Corelight)
+
 2.6-575 | 2019-07-09 18:28:03 -0700
 
   * Avoid a null dereference (Coverity-1402816) (Tim Wojtulewicz, Corelight)
diff --git a/NEWS b/NEWS
index acd25aff53..f59147d173 100644
--- a/NEWS
+++ b/NEWS
@@ -479,6 +479,7 @@ Removed Functionality
     - ``backdoor_stat_period``
     - ``backdoor_stat_backoff``
     - ``backdoor_endp_stats``
+    - ``chunked_io_buffer_soft_cap``
 
 - The following constants were used as part of deprecated functionality in version 2.6
   or below and are removed from this release:
diff --git a/VERSION b/VERSION
index 159139a67e..e16e9a62a0 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.6-575
+2.6-576
diff --git a/doc b/doc
index 80c0cb3d9d..fb4942d261 160000
--- a/doc
+++ b/doc
@@ -1 +1 @@
-Subproject commit 80c0cb3d9db1cea6661b3d3c79d17e3b67533507
+Subproject commit fb4942d261ebd2c8160a0862b527f3639ebf1245
diff --git a/scripts/base/init-bare.zeek b/scripts/base/init-bare.zeek
index bfb49579cd..7d539f3948 100644
--- a/scripts/base/init-bare.zeek
+++ b/scripts/base/init-bare.zeek
@@ -4608,11 +4608,6 @@ const sig_max_group_size = 50 &redef;
 ## Description transmitted to remote communication peers for identification.
 const peer_description = "zeek" &redef;
 
-## The number of IO chunks allowed to be buffered between the child
-## and parent process of remote communication before Zeek starts dropping
-## connections to remote peers in an attempt to catch up.
-const chunked_io_buffer_soft_cap = 800000 &redef;
-
 ## Reassemble the beginning of all TCP connections before doing
 ## signature matching. Enabling this provides more accurate matching at the
 ## expense of CPU cycles.
diff --git a/src/NetVar.cc b/src/NetVar.cc
index c256cfd496..981ca005ff 100644
--- a/src/NetVar.cc
+++ b/src/NetVar.cc
@@ -141,7 +141,6 @@ RecordType* rotate_info;
 StringVal* log_rotate_base_time;
 
 StringVal* peer_description;
-bro_uint_t chunked_io_buffer_soft_cap;
 
 Val* profiling_file;
 double profiling_interval;
@@ -213,7 +212,6 @@ void init_general_global_var()
 
 	peer_description =
 		internal_val("peer_description")->AsStringVal();
-	chunked_io_buffer_soft_cap = opt_internal_unsigned("chunked_io_buffer_soft_cap");
 
 	packet_filter_default = opt_internal_int("packet_filter_default");
 
diff --git a/src/NetVar.h b/src/NetVar.h
index 5dc5fcfb79..41b2028064 100644
--- a/src/NetVar.h
+++ b/src/NetVar.h
@@ -144,7 +144,6 @@ extern RecordType* rotate_info;
 extern StringVal* log_rotate_base_time;
 
 extern StringVal* peer_description;
-extern bro_uint_t chunked_io_buffer_soft_cap;
 
 extern Val* profiling_file;
 extern double profiling_interval;