diff --git a/src/uniproc_win64.c b/src/uniproc_win64.c
index ca0653b..33491a8 100644
--- a/src/uniproc_win64.c
+++ b/src/uniproc_win64.c
@@ -158,6 +158,11 @@ void uniproc_await_processes(const uniproc_process* p, int* return_codes, const
 		h[num_valid_handles++] = (HANDLE)p[i]._proc_hdl;
 	}
 	if (num_valid_handles == 0) return;
+	if (num_valid_handles >= MAXIMUM_WAIT_OBJECTS)
+	{
+		__debugbreak();
+		exit(-1);
+	}
 	WaitForMultipleObjects(num_valid_handles, h, 1, INFINITE);
 	free(h);
 
@@ -190,6 +195,11 @@ int uniproc_are_processes_finished(const uniproc_process* p, const size_t num_pr
 		h[i] = (HANDLE)p[i]._proc_hdl;
 		num_valid_handles++;
 	}
+	if (num_valid_handles >= MAXIMUM_WAIT_OBJECTS)
+	{
+		__debugbreak();
+		exit(-1);
+	}
 	if (num_valid_handles == 0) return 1;
 	DWORD ret = WaitForMultipleObjects(num_valid_handles, h, 1, 0);
 	free(h);
@@ -197,7 +207,7 @@ int uniproc_are_processes_finished(const uniproc_process* p, const size_t num_pr
 }
 
 void uniproc_nullify_processes(uniproc_process* p, const size_t num_processes)
-{ memset(p, 0, num_processes * sizeof(uniproc_process)); }
+{ memset(p, 0, sizeof(uniproc_process) * num_processes); }
 
 int uniproc_is_process_null(const uniproc_process* p)
 { return p->_proc_hdl == NULL; }
@@ -212,6 +222,11 @@ void uniproc_await_any_processes(const uniproc_process* p, const size_t num_proc
 		h[i] = (HANDLE)p[i]._proc_hdl;
 		num_valid_handles++;
 	}
+	if (num_valid_handles >= MAXIMUM_WAIT_OBJECTS)
+	{
+		__debugbreak();
+		exit(-1);
+	}
 	if (num_valid_handles == 0) return;
 	WaitForMultipleObjects(num_valid_handles, h, 0, INFINITE);
 	free(h);