diff --git a/daemon/remote_generator.pl b/daemon/remote_generator.pl
index bcf5fd44639b748106c0db14e9499e1a5873f0c2..b19de8db5e04a7b73ea79dbefdc2055844694b60 100755
--- a/daemon/remote_generator.pl
+++ b/daemon/remote_generator.pl
@@ -1007,7 +1007,7 @@ elsif ($opt_k) {
                     my $limit = $3;
 
                     push(@args_list, "${type_name} *$arg_name");
-                    push(@args_list, "unsigned int ${arg_name}len");
+                    push(@args_list, "int ${arg_name}len");
                     push(@setters_list, "args.$arg_name.${arg_name}_val = $arg_name;");
                     push(@setters_list, "args.$arg_name.${arg_name}_len = ${arg_name}len;");
                     push(@args_check_list, { name => "\"$arg_name\"", arg => "${arg_name}len", limit => $limit });
diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
index ab220466ef200ae6b2c4eefed7f92995ac7e2b35..c6842975fef40f2cf3236cbb387c0b758b6bc3d2 100644
--- a/include/libvirt/libvirt.h.in
+++ b/include/libvirt/libvirt.h.in
@@ -1788,7 +1788,7 @@ int virDomainSendKey(virDomainPtr domain,
                      unsigned int codeset,
                      unsigned int holdtime,
                      unsigned int *keycodes,
-                     unsigned int nkeycodes,
+                     int nkeycodes,
                      unsigned int flags);
 
 /*
diff --git a/src/driver.h b/src/driver.h
index d45575af995f06891426d41a85efc17a9f6f6da0..c8802220e4ad611f669c0eb16422affe8dd8d099 100644
--- a/src/driver.h
+++ b/src/driver.h
@@ -568,7 +568,7 @@ typedef int
     (*virDrvDomainSendKey)(virDomainPtr dom, unsigned int codeset,
                            unsigned int holdtime,
                            unsigned int *keycodes,
-                           unsigned int nkeycodes,
+                           int nkeycodes,
                            unsigned int flags);
 
 typedef char *
diff --git a/src/libvirt.c b/src/libvirt.c
index 36a90d1e04eb72f3b7c25ab636a8cbf7552182db..b2e1d02c15fd543870d38b99dc820574ec1b4b44 100644
--- a/src/libvirt.c
+++ b/src/libvirt.c
@@ -6653,7 +6653,7 @@ int virDomainSendKey(virDomainPtr domain,
                      unsigned int codeset,
                      unsigned int holdtime,
                      unsigned int *keycodes,
-                     unsigned int nkeycodes,
+                     int nkeycodes,
                      unsigned int flags)
 {
     virConnectPtr conn;
@@ -6663,7 +6663,7 @@ int virDomainSendKey(virDomainPtr domain,
     virResetLastError();
 
     if (keycodes == NULL ||
-        nkeycodes == 0 || nkeycodes > VIR_DOMAIN_SEND_KEY_MAX_KEYS) {
+        nkeycodes <= 0 || nkeycodes > VIR_DOMAIN_SEND_KEY_MAX_KEYS) {
         virLibDomainError(VIR_ERR_OPERATION_INVALID, __FUNCTION__);
         virDispatchError(NULL);
         return -1;