diff --git a/src/libsys/irq.c b/src/libsys/irq.c
index ebe2ea5..a4aa127 100644
--- a/src/libsys/irq.c
+++ b/src/libsys/irq.c
@@ -3,6 +3,7 @@
 #include "asm/regdef.h"
 #include "xcpt.h"
 #include "irq.h"
+#include <cop0.h>
 
 static fp_irq_t g_irq_handler[MAX_NUM_IRQ] = {NULL};
 
diff --git a/src/libsys/mips_dbg.c b/src/libsys/mips_dbg.c
index faf54e2..9830271 100644
--- a/src/libsys/mips_dbg.c
+++ b/src/libsys/mips_dbg.c
@@ -5,6 +5,7 @@
 #include "xcpt.h"
 #include "libsys.h"
 #include "mips_dis.h"
+#include "cop0.h"
 
 extern int instr_info(unsigned iword, instr_info_t *pInfo);
 extern int tdisasm(char *buffer, unsigned address, unsigned iword, unsigned char ext, unsigned *regmask, unsigned *symbol_value, unsigned *ls_register);
@@ -378,7 +379,9 @@ int dbg_handler(struct xcptcontext * xcp)
 				dbg_puts_d("2. Restore after RU at ");dbg_print_word_d((long)mgmt_bp_ru[1].pAddr);dbg_puts_d("\n");
 			}
 			if (!g_is_ss)
-				return;
+			{
+				return 0;
+			}
 
 			break;