diff --git a/src/Synth_Dexed.mk b/src/Synth_Dexed.mk
index 6aa4a49..4d42e67 100644
--- a/src/Synth_Dexed.mk
+++ b/src/Synth_Dexed.mk
@@ -40,8 +40,9 @@ INCLUDE += -I $(CMSIS_DSP_COMPUTELIB_INCLUDE_DIR)
 
 DEFINE += -DUSE_FX
 
-ifeq ($(strip $(AARCH)),64)
+ifeq ($(RPI), $(filter $(RPI), 3 4 5))
 DEFINE += -DARM_MATH_NEON
+DEFINE += -DARM_MATH_NEON_EXPERIMENTAL
 DEFINE += -DHAVE_NEON
 endif