diff --git a/firmware/target/arm/as3525/app.lds b/firmware/target/arm/as3525/app.lds
index 546aabbf4e..4807855198 100644
--- a/firmware/target/arm/as3525/app.lds
+++ b/firmware/target/arm/as3525/app.lds
@@ -13,7 +13,11 @@ STARTUP(target/arm/crt0.o)
 /* End of the audio buffer, where the codec buffer starts */
 #define ENDAUDIOADDR  (DRAM_ORIG + DRAMSIZE)
 
-#define CODEC_BUFFER_FILLS_IRAM defined(AMS_LOWMEM) || (CONFIG_CPU == AS3525v2)
+#if defined(AMS_LOWMEM) || (CONFIG_CPU == AS3525v2)
+#define CODEC_BUFFER_FILLS_IRAM 1
+#else
+#define CODEC_BUFFER_FILLS_IRAM 0
+#endif
 
 #if CODEC_BUFFER_FILLS_IRAM
 /* Entire codec buffer in IRAM */