diff --git a/lib/zstd/Makefile b/lib/zstd/Makefile
index 65218ec5b8f2a4e506796a755143513f6922a3c9..fc45339fc3a3659e56d112979891a619f8b862cb 100644
--- a/lib/zstd/Makefile
+++ b/lib/zstd/Makefile
@@ -11,8 +11,6 @@
 obj-$(CONFIG_ZSTD_COMPRESS) += zstd_compress.o
 obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd_decompress.o
 
-ccflags-y += -O3
-
 zstd_compress-y := \
 		zstd_compress_module.o \
 		common/debug.o \