diff --git a/src/util/virprocess.h b/src/util/virprocess.h
index d7d191ec75..003ba1edf4 100644
--- a/src/util/virprocess.h
+++ b/src/util/virprocess.h
@@ -107,7 +107,8 @@ typedef int (*virProcessForkCallback)(pid_t ppid,
                                       void *opaque);
 
 int virProcessRunInFork(virProcessForkCallback cb,
-                        void *opaque);
+                        void *opaque)
+    ATTRIBUTE_NOINLINE;
 
 int virProcessSetupPrivateMountNS(void);
 
diff --git a/tests/qemusecuritymock.c b/tests/qemusecuritymock.c
index 4edc5c44ad..d170e5da8f 100644
--- a/tests/qemusecuritymock.c
+++ b/tests/qemusecuritymock.c
@@ -416,3 +416,11 @@ int checkPaths(void)
     virMutexUnlock(&m);
     return ret;
 }
+
+
+int
+virProcessRunInFork(virProcessForkCallback cb,
+                    void *opaque)
+{
+    return cb(-1, opaque);
+}