diff --git a/config/env.ini b/config/env.ini
index 61079cb3..abb3a383 100644
--- a/config/env.ini
+++ b/config/env.ini
@@ -122,7 +122,7 @@ SPC_CMD_VAR_PHP_EMBED_TYPE="static"
 ; EXTRA_CFLAGS for `configure` and `make` php
 SPC_CMD_VAR_PHP_MAKE_EXTRA_CFLAGS="-g -fstack-protector-strong -fno-ident -fPIE -fvisibility=hidden -fvisibility-inlines-hidden ${SPC_DEFAULT_C_FLAGS}"
 ; EXTRA_CXXFLAGS for `configure` and `make` php
-SPC_CMD_VAR_PHP_MAKE_EXTRA_CXXFLAGS="-g -fstack-protector-strong -fno-ident -fPIE ${SPC_DEFAULT_CXX_FLAGS}"
+SPC_CMD_VAR_PHP_MAKE_EXTRA_CXXFLAGS="-g -fstack-protector-strong -fno-ident -fPIE -fvisibility=hidden -fvisibility-inlines-hidden ${SPC_DEFAULT_CXX_FLAGS}"
 ; EXTRA_LDFLAGS for `make` php, can use -release to set a soname for libphp.so
 SPC_CMD_VAR_PHP_MAKE_EXTRA_LDFLAGS=""
 
@@ -160,7 +160,7 @@ SPC_CMD_VAR_PHP_EMBED_TYPE="static"
 ; EXTRA_CFLAGS for `configure` and `make` php
 SPC_CMD_VAR_PHP_MAKE_EXTRA_CFLAGS="-g -fstack-protector-strong -fpic -fpie -fvisibility=hidden -fvisibility-inlines-hidden -Werror=unknown-warning-option ${SPC_DEFAULT_C_FLAGS}"
 ; EXTRA_CXXFLAGS for `configure` and `make` php
-SPC_CMD_VAR_PHP_MAKE_EXTRA_CXXFLAGS="-g -fstack-protector-strong -fno-ident -fpie -Werror=unknown-warning-option ${SPC_DEFAULT_CXX_FLAGS}"
+SPC_CMD_VAR_PHP_MAKE_EXTRA_CXXFLAGS="-g -fstack-protector-strong -fno-ident -fpie -fvisibility=hidden -fvisibility-inlines-hidden -Werror=unknown-warning-option ${SPC_DEFAULT_CXX_FLAGS}"
 ; EXTRA_LDFLAGS for `make` php, can use -release to set a soname for libphp.dylib
 SPC_CMD_VAR_PHP_MAKE_EXTRA_LDFLAGS=""
 ; minimum compatible macOS version (LLVM vars, availability not guaranteed)