diff --git a/cmake/platform/gcc.cmake b/cmake/platform/gcc.cmake
index f63ce2010..c18e63d5b 100644
--- a/cmake/platform/gcc.cmake
+++ b/cmake/platform/gcc.cmake
@@ -276,7 +276,7 @@ ENDIF(CFLAG_OPTIMIZE_FTREE_VECTORIZE)
 # Add "-Werror" *after* checking for everything else.
 SET(RP_C_FLAGS_COMMON   "${RP_C_FLAGS_COMMON} -Werror")
 SET(RP_CXX_FLAGS_COMMON "${RP_CXX_FLAGS_COMMON} -Werror")
-SET(CFLAGS_WNO_ERROR -Wno-error=unknown-pragmas -Wno-error=address -Wno-error=attributes -Wno-error=unused-parameter -Wno-error=unused-but-set-variable -Wno-error=ignored-qualifiers -Wno-error=missing-field-initializers -Wno-error=unused-variable -Wno-error=unused-function -Wno-error=type-limits -Wno-error=empty-body -Wno-error=address-of-packed-member -Wno-error=shift-negative-value -Wno-error=clobbered -Wno-error=overloaded-virtual -Wno-error=header-hygiene)
+SET(CFLAGS_WNO_ERROR -Wno-error=unknown-pragmas -Wno-error=address -Wno-error=attributes -Wno-error=unused-parameter -Wno-error=unused-but-set-variable -Wno-error=ignored-qualifiers -Wno-error=missing-field-initializers -Wno-error=unused-variable -Wno-error=unused-function -Wno-error=type-limits -Wno-error=empty-body -Wno-error=address-of-packed-member -Wno-error=shift-negative-value -Wno-error=clobbered -Wno-error=overloaded-virtual -Wno-error=header-hygiene -Wno-error=cast-align)
 FOREACH(FLAG_TEST ${CFLAGS_WNO_ERROR})
 	# CMake doesn't like certain characters in variable names.
 	STRING(REGEX REPLACE "/|:|=" "_" FLAG_TEST_VARNAME "${FLAG_TEST}")