diff --git a/crypto_adx_flag.mk b/crypto_adx_flag.mk
index ca25829f8f2..e088f6cf6c6 100644
--- a/crypto_adx_flag.mk
+++ b/crypto_adx_flag.mk
@@ -17,7 +17,7 @@ else
 endif
 
 # Flags to disable ADX instructions for older CPUs
-DISABLE_ADX := -O2 -D__BLST_PORTABLE__
+DISABLE_ADX := "-O2 -D__BLST_PORTABLE__"
 
 # Then, set `CRYPTO_FLAG`
 # the crypto package uses BLST source files underneath which may use ADX instructions.
@@ -27,4 +27,4 @@ ifeq ($(ADX_SUPPORT), 1)
 else
 # if ADX instructions aren't supported, this CGO flags uses a slower non-ADX implementation
 	CRYPTO_FLAG := $(DISABLE_ADX)
-endif
\ No newline at end of file
+endif