diff --git a/gnu/packages/java.scm b/gnu/packages/java.scm
index 679daf6fb5..57588c68e0 100644
--- a/gnu/packages/java.scm
+++ b/gnu/packages/java.scm
@@ -11,7 +11,7 @@
 ;;; Copyright © 2018 Chris Marusich <cmmarusich@gmail.com>
 ;;; Copyright © 2018-2024 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2019, 2020, 2021 Björn Höfling <bjoern.hoefling@bjoernhoefling.de>
-;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;; Copyright © 2020, 2025 Janneke Nieuwenhuizen <janneke@gnu.org>
 ;;; Copyright © 2020 Raghav Gururajan <raghavgururajan@disroot.org>
 ;;; Copyright © 2020, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2021 Vincent Legoll <vincent.legoll@gmail.com>
@@ -232,7 +232,12 @@ (define-public icedtea-7
              (lambda _
                (substitute* "openjdk.src/jdk/make/common/Defs-linux.gmk"
                  (("CFLAGS_COMMON   = -fno-strict-aliasing" all)
-                  (string-append all " -fcommon")))
+                  (string-append all
+                                 " -fcommon"
+                                 " -Wno-error=implicit-function-declaration"
+                                 " -Wno-error=implicit-int"
+                                 " -Wno-error=incompatible-pointer-types"
+                                 " -Wno-error=int-conversion")))
                (substitute*
                    '("openjdk.src/jdk/src/solaris/native/java/net/PlainSocketImpl.c"
                      "openjdk.src/jdk/src/solaris/native/java/net/PlainDatagramSocketImpl.c")