diff --git a/zephyr/include/rtos/alloc.h b/zephyr/include/rtos/alloc.h
index 509c691e3964..69228ea8f9c2 100644
--- a/zephyr/include/rtos/alloc.h
+++ b/zephyr/include/rtos/alloc.h
@@ -8,6 +8,7 @@
 
 #include <rtos/bit.h>
 #include <rtos/string.h>
+#include <sof/lib/memory.h> /* PLATFORM_DCACHE_ALIGN */
 #include <sof/trace/trace.h>
 #include <user/trace.h>