diff --git a/src/main/flight/mixer.c b/src/main/flight/mixer.c
index 6f3847c02..96b0505e9 100755
--- a/src/main/flight/mixer.c
+++ b/src/main/flight/mixer.c
@@ -92,18 +92,41 @@ static const motorMixer_t mixerQuadP[] = {
     { 1.0f,  0.0f, -1.0f, -1.0f },          // FRONT
 };
 
+#if defined(USE_UNCOMMON_MIXERS)
 static const motorMixer_t mixerBicopter[] = {
     { 1.0f,  1.0f,  0.0f,  0.0f },          // LEFT
     { 1.0f, -1.0f,  0.0f,  0.0f },          // RIGHT
 };
+#else
+#define mixerBicopter NULL
+#endif
 
-static const motorMixer_t mixerY6[] = {
-    { 1.0f,  0.0f,  1.333333f,  1.0f },     // REAR
-    { 1.0f, -1.0f, -0.666667f, -1.0f },     // RIGHT
-    { 1.0f,  1.0f, -0.666667f, -1.0f },     // LEFT
-    { 1.0f,  0.0f,  1.333333f, -1.0f },     // UNDER_REAR
-    { 1.0f, -1.0f, -0.666667f,  1.0f },     // UNDER_RIGHT
-    { 1.0f,  1.0f, -0.666667f,  1.0f },     // UNDER_LEFT
+static const motorMixer_t mixerY4[] = {
+    { 1.0f,  0.0f,  1.0f, -1.0f },          // REAR_TOP CW
+    { 1.0f, -1.0f, -1.0f,  0.0f },          // FRONT_R CCW
+    { 1.0f,  0.0f,  1.0f,  1.0f },          // REAR_BOTTOM CCW
+    { 1.0f,  1.0f, -1.0f,  0.0f },          // FRONT_L CW
+};
+
+
+#if (MAX_SUPPORTED_MOTORS >= 6)
+static const motorMixer_t mixerHex6X[] = {
+    { 1.0f, -0.5f,  0.866025f,  1.0f },     // REAR_R
+    { 1.0f, -0.5f, -0.866025f,  1.0f },     // FRONT_R
+    { 1.0f,  0.5f,  0.866025f, -1.0f },     // REAR_L
+    { 1.0f,  0.5f, -0.866025f, -1.0f },     // FRONT_L
+    { 1.0f, -1.0f,  0.0f,      -1.0f },     // RIGHT
+    { 1.0f,  1.0f,  0.0f,       1.0f },     // LEFT
+};
+
+#if defined(USE_UNCOMMON_MIXERS)
+static const motorMixer_t mixerHex6H[] = {
+    { 1.0f, -1.0f,  1.0f, -1.0f },     // REAR_R
+    { 1.0f, -1.0f, -1.0f,  1.0f },     // FRONT_R
+    { 1.0f,  1.0f,  1.0f,  1.0f },     // REAR_L
+    { 1.0f,  1.0f, -1.0f, -1.0f },     // FRONT_L
+    { 1.0f,  0.0f,  0.0f,  0.0f },     // RIGHT
+    { 1.0f,  0.0f,  0.0f,  0.0f },     // LEFT
 };
 
 static const motorMixer_t mixerHex6P[] = {
@@ -114,23 +137,24 @@ static const motorMixer_t mixerHex6P[] = {
     { 1.0f,  0.0f,      -1.0f,  1.0f },     // FRONT
     { 1.0f,  0.0f,       1.0f, -1.0f },     // REAR
 };
-
-static const motorMixer_t mixerY4[] = {
-    { 1.0f,  0.0f,  1.0f, -1.0f },          // REAR_TOP CW
-    { 1.0f, -1.0f, -1.0f,  0.0f },          // FRONT_R CCW
-    { 1.0f,  0.0f,  1.0f,  1.0f },          // REAR_BOTTOM CCW
-    { 1.0f,  1.0f, -1.0f,  0.0f },          // FRONT_L CW
-};
-
-static const motorMixer_t mixerHex6X[] = {
-    { 1.0f, -0.5f,  0.866025f,  1.0f },     // REAR_R
-    { 1.0f, -0.5f, -0.866025f,  1.0f },     // FRONT_R
-    { 1.0f,  0.5f,  0.866025f, -1.0f },     // REAR_L
-    { 1.0f,  0.5f, -0.866025f, -1.0f },     // FRONT_L
-    { 1.0f, -1.0f,  0.0f,      -1.0f },     // RIGHT
-    { 1.0f,  1.0f,  0.0f,       1.0f },     // LEFT
+static const motorMixer_t mixerY6[] = {
+    { 1.0f,  0.0f,  1.333333f,  1.0f },     // REAR
+    { 1.0f, -1.0f, -0.666667f, -1.0f },     // RIGHT
+    { 1.0f,  1.0f, -0.666667f, -1.0f },     // LEFT
+    { 1.0f,  0.0f,  1.333333f, -1.0f },     // UNDER_REAR
+    { 1.0f, -1.0f, -0.666667f,  1.0f },     // UNDER_RIGHT
+    { 1.0f,  1.0f, -0.666667f,  1.0f },     // UNDER_LEFT
 };
+#else
+#define mixerHex6H NULL
+#define mixerHex6P NULL
+#define mixerY6 NULL
+#endif // USE_UNCOMMON_MIXERS
+#else
+#define mixerHex6X NULL
+#endif // MAX_SUPPORTED_MOTORS >= 6
 
+#if defined(USE_UNCOMMON_MIXERS) && (MAX_SUPPORTED_MOTORS >= 8)
 static const motorMixer_t mixerOctoX8[] = {
     { 1.0f, -1.0f,  1.0f, -1.0f },          // REAR_R
     { 1.0f, -1.0f, -1.0f,  1.0f },          // FRONT_R
@@ -163,6 +187,11 @@ static const motorMixer_t mixerOctoFlatX[] = {
     { 1.0f, -0.414178f,  1.0f, -1.0f },      // REAR_R
     { 1.0f,  1.0f,  0.414178f, -1.0f },      // MIDREAR_L
 };
+#else
+#define mixerOctoX8 NULL
+#define mixerOctoFlatP NULL
+#define mixerOctoFlatX NULL
+#endif
 
 static const motorMixer_t mixerVtail4[] = {
     { 1.0f,  -0.58f,  0.58f, 1.0f },        // REAR_R
@@ -178,19 +207,14 @@ static const motorMixer_t mixerAtail4[] = {
     { 1.0f,  1.0f, -1.0f, -0.0f },          // FRONT_L
 };
 
-static const motorMixer_t mixerHex6H[] = {
-    { 1.0f, -1.0f,  1.0f, -1.0f },     // REAR_R
-    { 1.0f, -1.0f, -1.0f,  1.0f },     // FRONT_R
-    { 1.0f,  1.0f,  1.0f,  1.0f },     // REAR_L
-    { 1.0f,  1.0f, -1.0f, -1.0f },     // FRONT_L
-    { 1.0f,  0.0f,  0.0f,  0.0f },     // RIGHT
-    { 1.0f,  0.0f,  0.0f,  0.0f },     // LEFT
-};
-
+#if defined(USE_UNCOMMON_MIXERS)
 static const motorMixer_t mixerDualcopter[] = {
     { 1.0f,  0.0f,  0.0f, -1.0f },          // LEFT
     { 1.0f,  0.0f,  0.0f,  1.0f },          // RIGHT
 };
+#else
+#define mixerDualcopter NULL
+#endif
 
 static const motorMixer_t mixerSingleProp[] = {
     { 1.0f,  0.0f,  0.0f, 0.0f },
diff --git a/src/main/target/common.h b/src/main/target/common.h
index 65eb2bd9d..faafa5432 100644
--- a/src/main/target/common.h
+++ b/src/main/target/common.h
@@ -114,3 +114,6 @@
 #define USE_SENSOR_NAMES
 #endif
 
+#if (FLASH_SIZE > 256)
+#define USE_UNCOMMON_MIXERS
+#endif