diff --git a/thirdparty/build-thirdparty.sh b/thirdparty/build-thirdparty.sh
index bbd1e02f0b704a..5fe0450eaab7e5 100755
--- a/thirdparty/build-thirdparty.sh
+++ b/thirdparty/build-thirdparty.sh
@@ -321,7 +321,7 @@ build_snappy() {
 
     mkdir build -p && cd build
     rm -rf CMakeCache.txt CMakeFiles/
-    $CMAKE_CMD -DCMAKE_INSTALL_PREFIX=$TP_INSTALL_DIR \
+    CFLAGS="-O3" CXXFLAGS="-O3" $CMAKE_CMD -DCMAKE_INSTALL_PREFIX=$TP_INSTALL_DIR \
     -DCMAKE_POSITION_INDEPENDENT_CODE=On \
     -DCMAKE_INSTALL_INCLUDEDIR=$TP_INCLUDE_DIR/snappy \
     -DSNAPPY_BUILD_TESTS=0 ../