diff --git a/contrib/linux-kernel/linux.mk b/contrib/linux-kernel/linux.mk
index 9df9c9c6d..f6f3a8983 100644
--- a/contrib/linux-kernel/linux.mk
+++ b/contrib/linux-kernel/linux.mk
@@ -11,7 +11,6 @@
 obj-$(CONFIG_ZSTD_COMPRESS) += zstd_compress.o
 obj-$(CONFIG_ZSTD_DECOMPRESS) += zstd_decompress.o
 
-ccflags-y += -O3
 ccflags-y += -Wno-error=deprecated-declarations
 
 zstd_compress-y := \