diff --git a/uisimulator/common/sim_tasks.c b/uisimulator/common/sim_tasks.c
index 1f7e3bffcf..6ac2376316 100644
--- a/uisimulator/common/sim_tasks.c
+++ b/uisimulator/common/sim_tasks.c
@@ -270,6 +270,13 @@ int volume_drive(int volume)
 }
 #endif
 
+int volume_partition(int volume)
+{
+    (void)volume;
+    /* Sims only implement a single parition per drive */
+    return 0;
+}
+
 #if (CONFIG_STORAGE & STORAGE_MMC)
 bool mmc_touched(void)
 {