diff --git a/package/php/php.mk b/package/php/php.mk
index 56d66e40d7..0e9e68a5a9 100644
--- a/package/php/php.mk
+++ b/package/php/php.mk
@@ -78,15 +78,6 @@ PHP_CONFIG_SCRIPTS = php-config
 PHP_CFLAGS = $(TARGET_CFLAGS)
 PHP_CXXFLAGS = $(TARGET_CXXFLAGS)
 
-# The OPcache extension isn't cross-compile friendly
-# Throw some defines here to avoid patching heavily
-PHP_CFLAGS += \
-	-DHAVE_SHM_IPC \
-	-DHAVE_SHM_MMAP_ANON \
-	-DHAVE_SHM_MMAP_ZERO \
-	-DHAVE_SHM_MMAP_POSIX \
-	-DHAVE_SHM_MMAP_FILE
-
 # We need to force dl "detection"
 ifeq ($(BR2_STATIC_LIBS),)
 PHP_CONF_ENV += ac_cv_func_dlopen=yes ac_cv_lib_dl_dlopen=yes