diff --git a/ext/openssl/ossl_engine.c b/ext/openssl/ossl_engine.c
index da1a3c7a74..f99a30dfc3 100644
--- a/ext/openssl/ossl_engine.c
+++ b/ext/openssl/ossl_engine.c
@@ -523,18 +523,11 @@ ossl_engine_get_cmds(VALUE self)
 static VALUE
 ossl_engine_inspect(VALUE self)
 {
-    VALUE str;
-    const char *cname = rb_class2name(rb_obj_class(self));
+    ENGINE *e;
 
-    str = rb_str_new2("#<");
-    rb_str_cat2(str, cname);
-    rb_str_cat2(str, " id=\"");
-    rb_str_append(str, ossl_engine_get_id(self));
-    rb_str_cat2(str, "\" name=\"");
-    rb_str_append(str, ossl_engine_get_name(self));
-    rb_str_cat2(str, "\">");
-
-    return str;
+    GetEngine(self, e);
+    return rb_sprintf("#<%"PRIsVALUE" id=\"%s\" name=\"%s\">",
+		      rb_obj_class(self), ENGINE_get_id(e), ENGINE_get_name(e));
 }
 
 #define DefEngineConst(x) rb_define_const(cEngine, #x, INT2NUM(ENGINE_##x))
diff --git a/ext/openssl/ossl_x509cert.c b/ext/openssl/ossl_x509cert.c
index 84cedc763a..85bbc0d081 100644
--- a/ext/openssl/ossl_x509cert.c
+++ b/ext/openssl/ossl_x509cert.c
@@ -693,35 +693,15 @@ ossl_x509_add_extension(VALUE self, VALUE extension)
 static VALUE
 ossl_x509_inspect(VALUE self)
 {
-    VALUE str;
-    const char *cname = rb_class2name(rb_obj_class(self));
-
-    str = rb_str_new2("#<");
-    rb_str_cat2(str, cname);
-    rb_str_cat2(str, " ");
-
-    rb_str_cat2(str, "subject=");
-    rb_str_append(str, rb_inspect(ossl_x509_get_subject(self)));
-    rb_str_cat2(str, ", ");
-
-    rb_str_cat2(str, "issuer=");
-    rb_str_append(str, rb_inspect(ossl_x509_get_issuer(self)));
-    rb_str_cat2(str, ", ");
-
-    rb_str_cat2(str, "serial=");
-    rb_str_append(str, rb_inspect(ossl_x509_get_serial(self)));
-    rb_str_cat2(str, ", ");
-
-    rb_str_cat2(str, "not_before=");
-    rb_str_append(str, rb_inspect(ossl_x509_get_not_before(self)));
-    rb_str_cat2(str, ", ");
-
-    rb_str_cat2(str, "not_after=");
-    rb_str_append(str, rb_inspect(ossl_x509_get_not_after(self)));
-
-    str = rb_str_cat2(str, ">");
-
-    return str;
+    return rb_sprintf("#<%"PRIsVALUE": subject=%+"PRIsVALUE", "
+		      "issuer=%+"PRIsVALUE", serial=%+"PRIsVALUE", "
+		      "not_before=%+"PRIsVALUE", not_after=%+"PRIsVALUE">",
+		      rb_obj_class(self),
+		      ossl_x509_get_subject(self),
+		      ossl_x509_get_issuer(self),
+		      ossl_x509_get_serial(self),
+		      ossl_x509_get_not_before(self),
+		      ossl_x509_get_not_after(self));
 }
 
 /*
diff --git a/ext/syslog/syslog.c b/ext/syslog/syslog.c
index 482a0a2eee..8ef722e1c0 100644
--- a/ext/syslog/syslog.c
+++ b/ext/syslog/syslog.c
@@ -327,10 +327,10 @@ static VALUE mSyslog_inspect(VALUE self)
     Check_Type(self, T_MODULE);
 
     if (!syslog_opened)
-	return rb_sprintf("<#%s: opened=false>", rb_class2name(self));
+	return rb_sprintf("<#%"PRIsVALUE": opened=false>", self);
 
-    return rb_sprintf("<#%s: opened=true, ident=\"%s\", options=%d, facility=%d, mask=%d>",
-		      rb_class2name(self),
+    return rb_sprintf("<#%"PRIsVALUE": opened=true, ident=\"%s\", options=%d, facility=%d, mask=%d>",
+		      self,
 		      syslog_ident,
 		      syslog_options,
 		      syslog_facility,