diff --git a/client/src/ui.c b/client/src/ui.c
index e4fbe1b..0c89344 100644
--- a/client/src/ui.c
+++ b/client/src/ui.c
@@ -1060,7 +1060,9 @@ VkResult create_ui_context(
   memory->max_textures = max_textures;
   memory->max_fonts = max_fonts;
   memory->texture_slots = malloc(max_textures);
+  memset(memory->texture_slots, 0, max_textures);
   memory->font_slots = malloc(max_fonts);
+  memset(memory->font_slots, 0, max_fonts);
 
   return VK_SUCCESS;
 }