diff --git a/package/proj/proj.mk b/package/proj/proj.mk
index 0b239b2bbe..2969eb57ac 100644
--- a/package/proj/proj.mk
+++ b/package/proj/proj.mk
@@ -10,4 +10,12 @@ PROJ_LICENSE = MIT
 PROJ_LICENSE_FILES = COPYING
 PROJ_INSTALL_STAGING = YES
 
+PROJ_CFLAGS = $(TARGET_CFLAGS)
+
+ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_68485),y)
+PROJ_CFLAGS += -O0
+endif
+
+PROJ_CONF_ENV = CFLAGS="$(PROJ_CFLAGS)"
+
 $(eval $(autotools-package))