diff --git a/msvc/Makefile b/msvc/Makefile
index 73ea6b77a..17e81c791 100755
--- a/msvc/Makefile
+++ b/msvc/Makefile
@@ -10,8 +10,8 @@ srcdir	= ..\src
 
 SHORT_SITE_NAME   =
 LONG_SITE_NAME    =
-ECL_VERSION       = 16.1.2
-ECL_VERSION_NUMBER= 161002
+ECL_VERSION       = 16.1.3-dev
+ECL_VERSION_NUMBER= 160103
 ARCHITECTURE      = PENTIUM4
 SOFTWARE_TYPE     = NT
 SOFTWARE_VERSION  = 5.0
diff --git a/src/cmp/cmpcall.lsp b/src/cmp/cmpcall.lsp
index 37f25515b..7383a351e 100644
--- a/src/cmp/cmpcall.lsp
+++ b/src/cmp/cmpcall.lsp
@@ -268,7 +268,8 @@
          (env nil))
     (case (fun-closure fun)
       (CLOSURE
-       (setf env (environment-accessor fun)))
+       (when (plusp *max-env*)
+         (setf env (environment-accessor fun))))
       (LEXICAL
        (let ((lex-lvl (fun-level fun)))
          (dotimes (n lex-lvl)
diff --git a/src/cmp/cmptop.lsp b/src/cmp/cmptop.lsp
index 7a6c227ce..b94021d26 100644
--- a/src/cmp/cmptop.lsp
+++ b/src/cmp/cmptop.lsp
@@ -436,14 +436,17 @@
   ;; should definitely keep this in memory.
   (when (plusp *max-lex*)
     (wt-nl "volatile cl_object lex" *level* "[" *max-lex* "];"))
-  (when (plusp *max-env*)
-    (unless (eq closure-type 'CLOSURE)
-      (wt-nl "cl_object " *volatile* "env0;"))
-    ;; Note that the closure structure has to be marked volatile
-    ;; or else GCC may optimize away writes into it because it
-    ;; does not know it shared with the rest of the world.
+
+  (unless (eq closure-type 'CLOSURE)
+    (wt-nl "cl_object " *volatile* "env0;"))
+
+  (when  (plusp *max-env*)
+    ;; Closure structure has to be marked volatile or else GCC may
+    ;; optimize away writes into it because it does not know it shared
+    ;; with the rest of the world.
     (when *aux-closure*
       (wt-nl "volatile struct ecl_cclosure aux_closure;"))
+
     (wt-nl "cl_object " *volatile*)
     (loop for i from 0 below *max-env*
        for comma = "" then ", "
diff --git a/src/configure b/src/configure
index d55c5e53a..7b35a4a99 100755
--- a/src/configure
+++ b/src/configure
@@ -1,7 +1,7 @@
 #! /bin/sh
 # From configure.ac Revision.
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for ecl 16.1.2.
+# Generated by GNU Autoconf 2.69 for ecl 16.1.3-dev.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
@@ -578,8 +578,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='ecl'
 PACKAGE_TARNAME='ecl'
-PACKAGE_VERSION='16.1.2'
-PACKAGE_STRING='ecl 16.1.2'
+PACKAGE_VERSION='16.1.3-dev'
+PACKAGE_STRING='ecl 16.1.3-dev'
 PACKAGE_BUGREPORT=''
 PACKAGE_URL=''
 
@@ -1365,7 +1365,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures ecl 16.1.2 to adapt to many kinds of systems.
+\`configure' configures ecl 16.1.3-dev to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1434,7 +1434,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of ecl 16.1.2:";;
+     short | recursive ) echo "Configuration of ecl 16.1.3-dev:";;
    esac
   cat <<\_ACEOF
 
@@ -1609,7 +1609,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-ecl configure 16.1.2
+ecl configure 16.1.3-dev
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -2196,7 +2196,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by ecl $as_me 16.1.2, which was
+It was created by ecl $as_me 16.1.3-dev, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -10199,7 +10199,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by ecl $as_me 16.1.2, which was
+This file was extended by ecl $as_me 16.1.3-dev, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -10261,7 +10261,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-ecl config.status 16.1.2
+ecl config.status 16.1.3-dev
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/src/configure.ac b/src/configure.ac
index 137c8b74b..5617bfa94 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -8,7 +8,7 @@ dnl  AUTOCONF configuration for ECL
 dnl  Giuseppe Attardi 25.1.1994
 dnl
 
-AC_INIT([ecl],[16.1.2],[])
+AC_INIT([ecl],[16.1.3-dev],[])
 AC_REVISION([$Revision$])
 AC_CONFIG_SRCDIR([bare.lsp.in])
 AC_CONFIG_AUX_DIR([gmp])
diff --git a/src/tests/regressions/tests/compiler.lsp b/src/tests/regressions/tests/compiler.lsp
index 0c7124586..457a538ab 100644
--- a/src/tests/regressions/tests/compiler.lsp
+++ b/src/tests/regressions/tests/compiler.lsp
@@ -1150,3 +1150,20 @@
       (compile 'check-single-wildcard)
       (check-single-wildcard "dan*" 3))
   T)
+
+;;; Date: 2016-02-10
+;;; Fixed: Daniel Kochmański
+;;; Description
+;;;     Aux closures created by C compiler weren't handled correctly
+;;;     in respect of the environment and declarations of the
+;;;     variables
+(deftest compiler.0050.cmptop/call.1
+    (funcall (compile nil '(lambda ()
+                            (labels
+                                ((fun-2 () (fun-3 'cool))
+                                 (fun-3 (clause-var)
+                                   (flet ((fun-4 () clause-var))
+                                     (fun-4))))
+                              (let ((fun-1 (lambda () (fun-2))))
+                                (funcall fun-1))))))
+  cool)