diff --git a/docker_build/debian11sonic/build_hsflowd b/docker_build/debian11sonic/build_hsflowd
index 6b0ff3c..20005f3 100755
--- a/docker_build/debian11sonic/build_hsflowd
+++ b/docker_build/debian11sonic/build_hsflowd
@@ -3,7 +3,7 @@ echo "build_hsflowd on platform:  $1"
 
 git clone https://github.com/sflow/host-sflow \
 && cd host-sflow \
-&& make deb OPT=-g FEATURES="SONIC"
+&& make deb FEATURES="SONIC"
 
 for deb in `ls *.deb`; do cp "$deb" "/packages/${deb/hsflowd/hsflowd-$1}"; done
 echo ""
diff --git a/src/sflow/Makefile b/src/sflow/Makefile
index 13468fa..71f6c7f 100644
--- a/src/sflow/Makefile
+++ b/src/sflow/Makefile
@@ -4,8 +4,8 @@
 HEADERS= sflow_api.h sflow_xdr.h sflow.h Makefile
 
 #OPT = -O3 -DNDEBUG
-#OPT = -g -ggdb -O2
-OPT= -g -ggdb
+OPT = -g -ggdb -O2
+#OPT= -g -ggdb
 
 CFLAGS= -D_GNU_SOURCE -DSTDC_HEADERS $(OPT) -Wall -Wcast-align
 CFLAGS += -DSFL_USE_32BIT_INDEX -Wno-unused-function