diff --git a/java/openjdk18/Makefile b/java/openjdk18/Makefile
index 51251ca1cf65..1b9120750fae 100644
--- a/java/openjdk18/Makefile
+++ b/java/openjdk18/Makefile
@@ -154,6 +154,9 @@ EXTRA_CFLAGS+=		-Wno-unused-but-set-parameter
 .if ${COMPILER_VERSION} >= 140
 EXTRA_CFLAGS+=		-Wno-bitwise-instead-of-logical
 .endif
+.if ${COMPILER_VERSION} >= 150
+EXTRA_CFLAGS+=		-Wno-deprecated-non-prototype
+.endif
 CONFIGURE_ARGS+=	--with-extra-cflags="${EXTRA_CFLAGS}"
 CONFIGURE_ARGS+=	--with-extra-cxxflags="${EXTRA_CFLAGS}"
 .endif