diff --git a/src/libsysprof-ui/sysprof-details-page.c b/src/libsysprof-ui/sysprof-details-page.c
index 03963c55..daee5480 100644
--- a/src/libsysprof-ui/sysprof-details-page.c
+++ b/src/libsysprof-ui/sysprof-details-page.c
@@ -142,8 +142,12 @@ cpu_info_cb (const SysprofCaptureFrame *frame,
   const gchar *line;
   gchar **str = user_data;
 
-  endptr = (gchar *)fc->data + fc->len;
   line = memmem ((gchar *)fc->data, fc->len, "model name", 10);
+
+  if (!line)
+    return FALSE;
+
+  endptr = (gchar *)fc->data + fc->len;
   endptr = memchr (line, '\n', endptr - line);
 
   if (endptr)