diff --git a/android-webrtc.mk b/android-webrtc.mk
index 98b282127..d063dcd91 100644
--- a/android-webrtc.mk
+++ b/android-webrtc.mk
@@ -34,8 +34,8 @@ endif
 ifneq (,$(filter '-DWEBRTC_DETECT_ARM_NEON' '-DWEBRTC_ARCH_ARM_NEON', \
     $(MY_WEBRTC_COMMON_DEFS)))
 WEBRTC_BUILD_NEON_LIBS := true
-# TODO(kma): Use MY_WEBRTC_COMMON_DEFS for Neon libraies in AECM, NS, and iSAC.
-MY_WEBRTC_COMMON_DEFS += \
+# TODO(kma): Use MY_ARM_CFLAGS_NEON for Neon libraies in AECM, NS, and iSAC.
+MY_ARM_CFLAGS_NEON := \
     -mfpu=neon \
     -mfloat-abi=softfp \
     -flax-vector-conversions
diff --git a/src/common_audio/signal_processing/Android.mk b/src/common_audio/signal_processing/Android.mk
index 653bd028b..1bbcc7aa3 100644
--- a/src/common_audio/signal_processing/Android.mk
+++ b/src/common_audio/signal_processing/Android.mk
@@ -106,7 +106,9 @@ LOCAL_SRC_FILES := \
     vector_scaling_operations_neon.s
 
 # Flags passed to both C and C++ files.
-LOCAL_CFLAGS := $(MY_WEBRTC_COMMON_DEFS)
+LOCAL_CFLAGS := \
+    $(MY_WEBRTC_COMMON_DEFS) \
+    $(MY_ARM_CFLAGS_NEON)
 
 LOCAL_C_INCLUDES := \
     $(LOCAL_PATH)/include \