diff --git a/gtk/gtkscale.c b/gtk/gtkscale.c
index 2a402270f1..8c2f797488 100644
--- a/gtk/gtkscale.c
+++ b/gtk/gtkscale.c
@@ -1939,7 +1939,7 @@ weed_out_neg_zero (gchar *str, gint digits)
   if (str[0] == '-')
     {
       gchar neg_zero[8];
-      snprintf (neg_zero, 8, "%0.*f", digits, -0.0);
+      g_snprintf (neg_zero, 8, "%0.*f", digits, -0.0);
       if (strcmp (neg_zero, str) == 0)
         memmove (str, str + 1, strlen (str) - 1);
     }
diff --git a/gtk/gtkspinbutton.c b/gtk/gtkspinbutton.c
index c159f26d3a..452ed33468 100644
--- a/gtk/gtkspinbutton.c
+++ b/gtk/gtkspinbutton.c
@@ -1121,7 +1121,7 @@ weed_out_neg_zero (gchar *str, gint digits)
   if (str[0] == '-')
     {
       gchar neg_zero[8];
-      snprintf (neg_zero, 8, "%0.*f", digits, -0.0);
+      g_snprintf (neg_zero, 8, "%0.*f", digits, -0.0);
       if (strcmp (neg_zero, str) == 0)
         memmove (str, str + 1, strlen (str) - 1);
     }