diff --git a/package/gnuradio/gnuradio.mk b/package/gnuradio/gnuradio.mk
index 972f7a494e..5cb00d2416 100644
--- a/package/gnuradio/gnuradio.mk
+++ b/package/gnuradio/gnuradio.mk
@@ -36,7 +36,7 @@ GNURADIO_INSTALL_STAGING = YES
 # CFLAGS to decide whether to build the NEON functions or not, and
 # wants to see the string 'armv7' in the CFLAGS.
 ifeq ($(BR2_ARM_CPU_ARMV7A)$(BR2_ARM_CPU_HAS_NEON),yy)
-GNURADIO_CONF_OPTS += -DCMAKE_C_FLAGS="-march=armv7-a"
+GNURADIO_CONF_OPTS += -DCMAKE_C_FLAGS="$(TARGET_CFLAGS) -march=armv7-a"
 endif
 
 # As soon as -mfpu=neon is supported by the compiler, gnuradio will try