diff --git a/vim.changes b/vim.changes
index a505cd1..cb552c0 100644
--- a/vim.changes
+++ b/vim.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Tue Apr  1 16:22:17 UTC 2025 - Friedrich Haubensak <hsk17@mail.de>
+
+- add -std=gnu11 to CFLAGS to fix gcc15 compile time error, and to
+  still allow build on Leap 15.6
+
 -------------------------------------------------------------------
 Sat Mar 29 15:25:13 UTC 2025 - Atri Bhattacharya <badshah400@gmail.com>
 
diff --git a/vim.spec b/vim.spec
index 4000216..f40a6dd 100644
--- a/vim.spec
+++ b/vim.spec
@@ -228,7 +228,9 @@ cp %{SOURCE23} runtime/syntax/apparmor.vim
 cp %{SOURCE3} %{SOURCE4} %{SOURCE5} %{SOURCE8} %{SOURCE10} .
 
 %build
-export CFLAGS="%{optflags} -Wall -pipe -fno-strict-aliasing"
+## about -std=gnu17 see github.com/vim/vim/issues/16575;
+## use -std=gnu11 here to allow build on Leap 15.6
+export CFLAGS="%{optflags} -Wall -pipe -fno-strict-aliasing -std=gnu11"
 export CFLAGS=${CFLAGS/-D_FORTIFY_SOURCE=2/-D_FORTIFY_SOURCE=1}
 
 export COMMON_OPTIONS="\