diff --git a/clients/common/nm-client-utils.c b/clients/common/nm-client-utils.c
index d5f8b2a336..a15a10b3bc 100644
--- a/clients/common/nm-client-utils.c
+++ b/clients/common/nm-client-utils.c
@@ -21,30 +21,6 @@
 
 #include "nm-client-utils.h"
 
-/*
- * Convert string to signed integer.
- * If required, the resulting number is checked to be in the <min,max> range.
- */
-static gboolean
-nmc_string_to_int_base (const char *str,
-                        int base,
-                        gboolean range_check,
-                        long int min,
-                        long int max,
-                        long int *value)
-{
-	char *end;
-	long int tmp;
-
-	errno = 0;
-	tmp = strtol (str, &end, base);
-	if (errno || *end != '\0' || (range_check && (tmp < min || tmp > max))) {
-		return FALSE;
-	}
-	*value = tmp;
-	return TRUE;
-}
-
 /*
  * Convert string to unsigned integer.
  * If required, the resulting number is checked to be in the <min,max> range.
@@ -69,16 +45,6 @@ nmc_string_to_uint_base (const char *str,
 	return TRUE;
 }
 
-gboolean
-nmc_string_to_int (const char *str,
-                   gboolean range_check,
-                   long int min,
-                   long int max,
-                   long int *value)
-{
-	return nmc_string_to_int_base (str, 10, range_check, min, max, value);
-}
-
 gboolean
 nmc_string_to_uint (const char *str,
                     gboolean range_check,
diff --git a/clients/common/nm-client-utils.h b/clients/common/nm-client-utils.h
index 46479c7e32..aea29e6360 100644
--- a/clients/common/nm-client-utils.h
+++ b/clients/common/nm-client-utils.h
@@ -33,11 +33,6 @@ const char *nmc_string_is_valid (const char *input, const char **allowed, GError
 
 char **nmc_strsplit_set (const char *str, const char *delimiter, int max_tokens);
 
-gboolean nmc_string_to_int (const char *str,
-                            gboolean range_check,
-                            long int min,
-                            long int max,
-                            long int *value);
 gboolean nmc_string_to_uint (const char *str,
                              gboolean range_check,
                              unsigned long int min,
diff --git a/clients/common/nm-meta-setting-desc.c b/clients/common/nm-meta-setting-desc.c
index 8312fb429f..88f363d7e6 100644
--- a/clients/common/nm-meta-setting-desc.c
+++ b/clients/common/nm-meta-setting-desc.c
@@ -791,54 +791,54 @@ _set_fcn_gobject_bool (ARGS_SET_FCN)
 static gboolean
 _set_fcn_gobject_trilean (ARGS_SET_FCN)
 {
-	long int val_int;
+	const int INVALID = G_MININT;
+	int v;
 
-	g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
-
-	if (!nmc_string_to_int (value, TRUE, -1, 1, &val_int)) {
+	v = _nm_utils_ascii_str_to_int64 (value, 10, -1, 1, INVALID);
+	if (v == INVALID) {
 		g_set_error (error, 1, 0, _("'%s' is not a valid value; use -1, 0 or 1"), value);
 		return FALSE;
 	}
-
-	g_object_set (setting, property_info->property_name, val_int, NULL);
+	g_object_set (setting, property_info->property_name, v, NULL);
 	return TRUE;
 }
 
 static gboolean
 _set_fcn_gobject_int (ARGS_SET_FCN)
 {
-	long int val_int;
+	const gint64 INVALID = G_MININT64;
+	gint64 v;
 
-	if (!nmc_string_to_int (value, TRUE, G_MININT, G_MAXINT, &val_int)) {
+	v = _nm_utils_ascii_str_to_int64 (value, 10, G_MININT, G_MAXINT, INVALID);
+	if (v == INVALID) {
 		g_set_error (error, 1, 0, _("'%s' is not a valid number (or out of range)"), value);
 		return FALSE;
 	}
 
 	/* Validate the number according to the property spec */
-	if (!validate_int (setting, property_info->property_name, (gint) val_int, error))
+	if (!validate_int (setting, property_info->property_name, v, error))
 		return FALSE;
 
-	g_object_set (setting, property_info->property_name, (gint) val_int, NULL);
+	g_object_set (setting, property_info->property_name, (int) v, NULL);
 	return TRUE;
 }
 
 static gboolean
 _set_fcn_gobject_int64 (ARGS_SET_FCN)
 {
-	long val_int;
+	gint64 v;
 
-	g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
-
-	if (!nmc_string_to_int (value, FALSE, 0, 0, &val_int)) {
+	v = _nm_utils_ascii_str_to_int64 (value, 10, G_MININT64, G_MAXINT64, 0);
+	if (errno) {
 		g_set_error (error, 1, 0, _("'%s' is not a valid number (or out of range)"), value);
 		return FALSE;
 	}
 
 	/* Validate the number according to the property spec */
-	if (!validate_int64 (setting, property_info->property_name, (gint64) val_int, error))
+	if (!validate_int64 (setting, property_info->property_name, v, error))
 		return FALSE;
 
-	g_object_set (setting, property_info->property_name, (gint64) val_int, NULL);
+	g_object_set (setting, property_info->property_name, v, NULL);
 	return TRUE;
 }
 
@@ -2717,20 +2717,19 @@ _set_fcn_dcb_flags (ARGS_SET_FCN)
 static gboolean
 _set_fcn_dcb_priority (ARGS_SET_FCN)
 {
-	long int priority = 0;
+	const int INVALID = G_MININT;
+	int v;
 
-	g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
-
-	if (!nmc_string_to_int (value, FALSE, -1, 7, &priority)) {
+	v = _nm_utils_ascii_str_to_int64 (value, 10, -1, 7, INVALID);
+	if (v == INVALID) {
 		g_set_error (error, 1, 0, _("'%s' is not a DCB app priority"), value);
 		return FALSE;
 	}
 
-	/* Validate the number according to the property spec */
-	if (!validate_int (setting, property_info->property_name, (gint) priority, error))
+	if (!validate_int (setting, property_info->property_name, v, error))
 		return FALSE;
 
-	g_object_set (setting, property_info->property_name, (gint) priority, NULL);
+	g_object_set (setting, property_info->property_name, v, NULL);
 	return TRUE;
 }