diff --git a/lib/libcasper/services/cap_grp/Makefile b/lib/libcasper/services/cap_grp/Makefile
--- a/lib/libcasper/services/cap_grp/Makefile
+++ b/lib/libcasper/services/cap_grp/Makefile
@@ -40,3 +40,6 @@
 MLINKS+=cap_grp.3 cap_grp_limit_groups.3
 
 .include <bsd.lib.mk>
+
+# GCC 13 complains incorrectly about free after failed realloc: GCC bug #110501
+CFLAGS.cap_grp.c+= ${NO_WUSE_AFTER_FREE}
diff --git a/lib/libcasper/services/cap_netdb/Makefile b/lib/libcasper/services/cap_netdb/Makefile
--- a/lib/libcasper/services/cap_netdb/Makefile
+++ b/lib/libcasper/services/cap_netdb/Makefile
@@ -29,3 +29,6 @@
 MLINKS+=cap_netdb.3 cap_getprotobyname.3
 
 .include <bsd.lib.mk>
+
+# GCC 13 complains incorrectly about free after failed realloc: GCC bug #110501
+CFLAGS.cap_netdb.c+= ${NO_WUSE_AFTER_FREE}
diff --git a/lib/libcasper/services/cap_pwd/Makefile b/lib/libcasper/services/cap_pwd/Makefile
--- a/lib/libcasper/services/cap_pwd/Makefile
+++ b/lib/libcasper/services/cap_pwd/Makefile
@@ -40,3 +40,6 @@
 MLINKS+=cap_pwd.3 cap_pwd_limit_users.3
 
 .include <bsd.lib.mk>
+
+# GCC 13 complains incorrectly about free after failed realloc: GCC bug #110501
+CFLAGS.cap_pwd.c+= ${NO_WUSE_AFTER_FREE}