diff --git a/include/hw/s390x/s390-virtio-ccw.h b/include/hw/s390x/s390-virtio-ccw.h
index 41a9d2862b..a9a90c2022 100644
--- a/include/hw/s390x/s390-virtio-ccw.h
+++ b/include/hw/s390x/s390-virtio-ccw.h
@@ -56,4 +56,6 @@ bool gs_allowed(void);
  */
 bool css_migration_enabled(void);
 
+void subsystem_reset(void);
+
 #endif
diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h
index 7073fa59e9..372f7d8885 100644
--- a/target/s390x/cpu.h
+++ b/target/s390x/cpu.h
@@ -721,7 +721,6 @@ int s390_cpu_virt_mem_rw(S390CPU *cpu, vaddr laddr, uint8_t ar, void *hostbuf,
 
 /* outside of target/s390x/ */
 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr);
-extern void subsystem_reset(void);
 int sclp_service_call(CPUS390XState *env, uint64_t sccb, uint32_t code);
 
 #endif
diff --git a/target/s390x/diag.c b/target/s390x/diag.c
index e6b5e6de37..82a623948d 100644
--- a/target/s390x/diag.c
+++ b/target/s390x/diag.c
@@ -20,6 +20,7 @@
 #include "hw/watchdog/wdt_diag288.h"
 #include "sysemu/cpus.h"
 #include "hw/s390x/ipl.h"
+#include "hw/s390x/s390-virtio-ccw.h"
 
 static int modified_clear_reset(S390CPU *cpu)
 {