diff --git a/firmware/export/config.h b/firmware/export/config.h
index 74be1f9711..26ed7395ff 100644
--- a/firmware/export/config.h
+++ b/firmware/export/config.h
@@ -601,6 +601,15 @@ Lyre prototype 1 */
 //#error "unknown hwardware platform!"
 #endif
 
+#ifndef CONFIG_CPU
+#define CONFIG_CPU 0
+#endif
+
+// NOTE: should be placed before sim.h (where CONFIG_CPU is undefined)
+#if !(CONFIG_CPU >= PP5002 && CONFIG_CPU <= PP5022) && CODEC_SIZE >= 0x80000
+#define CODEC_AAC_SBR_DEC
+#endif
+
 #ifdef __PCTOOL__
 #undef CONFIG_CPU
 #define CONFIG_CPU 0
@@ -681,10 +690,6 @@ Lyre prototype 1 */
 /* now set any CONFIG_ defines correctly if they are not used,
    No need to do this on CONFIG_'s which are compulsory (e.g CONFIG_CODEC ) */
 
-#if !(CONFIG_CPU >= PP5002 && CONFIG_CPU <= PP5022) && CODEC_SIZE >= 0x80000
-#define CODEC_AAC_SBR_DEC
-#endif
-
 #if !defined(CONFIG_BACKLIGHT_FADING)
 #define CONFIG_BACKLIGHT_FADING BACKLIGHT_NO_FADING
 #endif