diff --git a/apps/backend/Makefile.in b/apps/backend/Makefile.in
index 2a412bca..ce9f2201 100644
--- a/apps/backend/Makefile.in
+++ b/apps/backend/Makefile.in
@@ -81,7 +81,7 @@ endif
 # even though it may exist in $(libdir). But the new version may not have been installed yet.
 LIBDEPS		= $(top_srcdir)/lib/src/$(CLIXON_LIB) 
 
-LIBS    	= -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ 
+LIBS    	= -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ -lm
 INCLUDES	= -I. -I$(top_srcdir)/lib/src -I$(top_srcdir)/lib -I$(top_srcdir)/include -I$(top_srcdir) @INCLUDES@
 
 # Name of application
diff --git a/apps/cli/Makefile.in b/apps/cli/Makefile.in
index 01f9825a..1ab39dad 100644
--- a/apps/cli/Makefile.in
+++ b/apps/cli/Makefile.in
@@ -88,7 +88,7 @@ endif # LINKAGE
 # even though it may exist in $(libdir). But the new version may not have been installed yet.
 LIBDEPS		= $(top_srcdir)/lib/src/$(CLIXON_LIB) 
 
-LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@
+LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ -lm
 
 INCLUDES	= -I. -I$(top_srcdir)/lib -I$(top_srcdir)/include -I$(top_srcdir) @INCLUDES@
 
diff --git a/apps/netconf/Makefile.in b/apps/netconf/Makefile.in
index 8289b53e..0392c898 100644
--- a/apps/netconf/Makefile.in
+++ b/apps/netconf/Makefile.in
@@ -75,7 +75,7 @@ endif
 # For dependency
 LIBDEPS		= $(top_srcdir)/lib/src/$(CLIXON_LIB) 
 
-LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ 
+LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ -lm
 
 ifeq ($(LINKAGE),dynamic)
 	CPPFLAGS  	= @CPPFLAGS@ -fPIC
diff --git a/apps/restconf/Makefile.in b/apps/restconf/Makefile.in
index e62f7ac1..dd228142 100644
--- a/apps/restconf/Makefile.in
+++ b/apps/restconf/Makefile.in
@@ -81,7 +81,7 @@ endif
 # For dependency
 LIBDEPS		= $(top_srcdir)/lib/src/$(CLIXON_LIB) 
 
-LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ 
+LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ -lm
 
 YACC		= @YACC@
 LEX		= @LEX@
diff --git a/apps/snmp/Makefile.in b/apps/snmp/Makefile.in
index fa2a2866..babec4db 100644
--- a/apps/snmp/Makefile.in
+++ b/apps/snmp/Makefile.in
@@ -74,7 +74,7 @@ endif
 # For dependency
 LIBDEPS		= $(top_srcdir)/lib/src/$(CLIXON_LIB) 
 
-LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ 
+LIBS          = -L$(top_srcdir)/lib/src $(top_srcdir)/lib/src/$(CLIXON_LIB) @LIBS@ -lm
 
 CPPFLAGS  	= @CPPFLAGS@
 
diff --git a/lib/src/clixon_hash.c b/lib/src/clixon_hash.c
index e03e56ff..91bff43f 100644
--- a/lib/src/clixon_hash.c
+++ b/lib/src/clixon_hash.c
@@ -384,7 +384,7 @@ clicon_hash_dump(clicon_hash_t *hash,
     char **keys = NULL;
     void  *val;
     size_t klen;
-    size_t vlen;
+    size_t vlen = 0;
 
     if (hash == NULL)
         goto ok;
diff --git a/lib/src/clixon_proto.c b/lib/src/clixon_proto.c
index 96f8a3ba..d3f20074 100644
--- a/lib/src/clixon_proto.c
+++ b/lib/src/clixon_proto.c
@@ -579,7 +579,6 @@ clixon_msg_rcv11(int         s,
     if (intr){
         if (clixon_signal_save(&oldsigset, oldsigaction) < 0)
             goto done;
-
         set_signal(SIGINT, SIG_IGN, NULL);
         clicon_signal_unblock(SIGINT);
         set_signal_flags(SIGINT, 0, atomicio_sig_handler, NULL);
diff --git a/test/lib.sh b/test/lib.sh
index 1e724631..0617467d 100755
--- a/test/lib.sh
+++ b/test/lib.sh
@@ -553,6 +553,9 @@ function start_backend(){
 }
 
 function stop_backend(){
+    if [ $valgrindtest -eq 2 ]; then
+        sleep 1
+    fi
     sudo clixon_backend -z $*
     if [ $? -ne 0 ]; then
         err "kill backend"
diff --git a/test/test_upgrade_module.sh b/test/test_upgrade_module.sh
index 5b1eab69..fd0b1c36 100755
--- a/test/test_upgrade_module.sh
+++ b/test/test_upgrade_module.sh
@@ -315,7 +315,7 @@ EOF
 new "b payload only"
 testall '<dummy xmlns="urn:example:b"/>' '<dummy xmlns="urn:example:b"/>'
 
-new "b payload and interfaces payload---------"
+new "b payload and interfaces payload"
 testall '<dummy xmlns="urn:example:b"/><dummy xmlns="urn:example:interfaces"/>' '<dummy xmlns="urn:example:b"/>'
 
 new "a payload only"