diff --git a/gcc/ctfc.cc b/gcc/ctfc.cc
index 51511d69baa..221e62e8f45 100644
--- a/gcc/ctfc.cc
+++ b/gcc/ctfc.cc
@@ -798,7 +798,7 @@ ctf_add_function (ctf_container_ref ctfc, uint32_t flag, const char * name,
 
 ctf_dtdef_ref
 ctf_add_sou (ctf_container_ref ctfc, uint32_t flag, const char * name,
-	     uint32_t kind, size_t size, dw_die_ref die)
+	     uint32_t kind, unsigned HOST_WIDE_INT size, dw_die_ref die)
 {
   ctf_dtdef_ref dtd;
 
diff --git a/gcc/ctfc.h b/gcc/ctfc.h
index 32c73be6a41..26f35f0ac6f 100644
--- a/gcc/ctfc.h
+++ b/gcc/ctfc.h
@@ -439,7 +439,7 @@ extern ctf_dtdef_ref ctf_add_function (ctf_container_ref, uint32_t,
 				       const char *, const ctf_funcinfo_t *,
 				       dw_die_ref, bool, int);
 extern ctf_dtdef_ref ctf_add_sou (ctf_container_ref, uint32_t, const char *,
-				  uint32_t, size_t, dw_die_ref);
+				  uint32_t, unsigned HOST_WIDE_INT, dw_die_ref);
 
 extern int ctf_add_enumerator (ctf_container_ref, ctf_dtdef_ref, const char *,
 			       HOST_WIDE_INT, dw_die_ref);