diff --git a/firmware/asm/arm/pcm-mixer-armv4.c b/firmware/asm/arm/pcm-mixer-armv4.c
index dc2edb781c..cb138fc565 100644
--- a/firmware/asm/arm/pcm-mixer-armv4.c
+++ b/firmware/asm/arm/pcm-mixer-armv4.c
@@ -19,9 +19,6 @@
  *
  ****************************************************************************/
 
-#define MIXER_OPTIMIZED_WRITE_SAMPLES
-#define MIXER_OPTIMIZED_MIX_SAMPLES
-
 /* Mix channels' samples and apply gain factors */
 static FORCE_INLINE void mix_samples(void *out,
                                      const void *src0,
diff --git a/firmware/asm/arm/pcm-mixer-armv5.c b/firmware/asm/arm/pcm-mixer-armv5.c
index add1522fd9..399e6a4373 100644
--- a/firmware/asm/arm/pcm-mixer-armv5.c
+++ b/firmware/asm/arm/pcm-mixer-armv5.c
@@ -19,9 +19,6 @@
  *
  ****************************************************************************/
 
-#define MIXER_OPTIMIZED_WRITE_SAMPLES
-#define MIXER_OPTIMIZED_MIX_SAMPLES
-
 /* Mix channels' samples and apply gain factors */
 static FORCE_INLINE void mix_samples(void *out,
                                      const void *src0,
diff --git a/firmware/asm/arm/pcm-mixer-armv6.c b/firmware/asm/arm/pcm-mixer-armv6.c
index c1334bcd6a..7bf83ecf66 100644
--- a/firmware/asm/arm/pcm-mixer-armv6.c
+++ b/firmware/asm/arm/pcm-mixer-armv6.c
@@ -18,8 +18,6 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-#define MIXER_OPTIMIZED_MIX_SAMPLES
-#define MIXER_OPTIMIZED_WRITE_SAMPLES
 
 /* Mix channels' samples and apply gain factors */
 static FORCE_INLINE void mix_samples(void *out,
diff --git a/firmware/asm/m68k/pcm-mixer.c b/firmware/asm/m68k/pcm-mixer.c
index 2969546e56..cee2074cd1 100644
--- a/firmware/asm/m68k/pcm-mixer.c
+++ b/firmware/asm/m68k/pcm-mixer.c
@@ -19,8 +19,6 @@
  *
  ****************************************************************************/
 
-#define MIXER_OPTIMIZED_MIX_SAMPLES
-#define MIXER_OPTIMIZED_WRITE_SAMPLES
 static struct emac_context
 {
     unsigned long saved;