diff --git a/dhcp.changes b/dhcp.changes
index 34b2c85..e806509 100644
--- a/dhcp.changes
+++ b/dhcp.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Apr  7 14:33:35 UTC 2025 - Friedrich Haubensak <hsk17@mail.de>
+
+- add -std=gnu17 to CFLAGS to fix gcc15 compile time error
+
 -------------------------------------------------------------------
 Mon Jan 13 15:43:31 UTC 2025 - Jorik Cronenberg <jorik.cronenberg@suse.com>
 
diff --git a/dhcp.spec b/dhcp.spec
index 2be7426..8fd3171 100644
--- a/dhcp.spec
+++ b/dhcp.spec
@@ -241,7 +241,7 @@ popd
 
 %build
 %global _lto_cflags %{_lto_cflags} -ffat-lto-objects
-CFLAGS="%{optflags} -D_GNU_SOURCE -W -Wall -Wno-unused -fcommon -fno-strict-aliasing"
+CFLAGS="%{optflags} -D_GNU_SOURCE -W -Wall -Wno-unused -fcommon -fno-strict-aliasing -std=gnu17"
 %ifarch ppc ppc64 s390x
   # bugs 134590, 171532
   CFLAGS="$CFLAGS -fsigned-char"