diff --git a/argparse.c b/argparse.c
index fb3c3e32..4e0554b1 100644
--- a/argparse.c
+++ b/argparse.c
@@ -51,6 +51,10 @@ argparse_getvalue(struct argparse *self, const struct argparse_option *opt,
 				  int flags)
 {
 	const char *s = NULL;
+	char buf[256];
+	buf[0] = 0;
+	char *pbuf = buf;
+
 	if (!opt->value)
 		goto skipped;
 	switch (opt->type) {
@@ -93,8 +97,14 @@ argparse_getvalue(struct argparse *self, const struct argparse_option *opt,
 		} else {
 			argparse_error(self, opt, "requires a value", flags);
 		}
-		if (errno)
-			argparse_error(self, opt, strerror(errno), flags);
+		if (errno){
+			#ifdef _WIN32
+			strerror_s(buf, sizeof(buf), errno);
+			#else
+			strerror_r(errno, buf, sizeof(buf));
+			#endif
+			argparse_error(self, opt, pbuf, flags);
+		}
 		if (s[0] != '\0')
 			argparse_error(self, opt, "expects an integer value", flags);
 		break;
@@ -109,8 +119,14 @@ argparse_getvalue(struct argparse *self, const struct argparse_option *opt,
 		} else {
 			argparse_error(self, opt, "requires a value", flags);
 		}
-		if (errno)
-			argparse_error(self, opt, strerror(errno), flags);
+		if (errno){
+			#ifdef _WIN32
+			strerror_s(buf, sizeof(buf), errno);
+			#else
+			strerror_r(errno, buf, sizeof(buf));
+			#endif
+			argparse_error(self, opt, pbuf, flags);
+		}
 		if (s[0] != '\0')
 			argparse_error(self, opt, "expects an unsigned 32-bit integer value", flags);
 		break;
@@ -125,8 +141,14 @@ argparse_getvalue(struct argparse *self, const struct argparse_option *opt,
 		} else {
 			argparse_error(self, opt, "requires a value", flags);
 		}
-		if (errno)
-			argparse_error(self, opt, strerror(errno), flags);
+		if (errno){
+			#ifdef _WIN32
+			strerror_s(buf, sizeof(buf), errno);
+			#else
+			strerror_r(errno, buf, sizeof(buf));
+			#endif
+			argparse_error(self, opt, pbuf, flags);
+		}
 		if (s[0] != '\0')
 			argparse_error(self, opt, "expects a numerical value", flags);
 		break;
diff --git a/lib/winring0.cpp b/lib/winring0.cpp
index 05f9fa69..9be4617b 100644
--- a/lib/winring0.cpp
+++ b/lib/winring0.cpp
@@ -18,7 +18,7 @@ extern "C" pci_obj_t init_pci_obj(){
     InitializeOls();
     if(GetDllStatus() == 0)
         return &nb_pci_obj;
-    printf("WinRing0 Err: 0x%x",GetDllStatus());
+    printf("WinRing0 Err: 0x%lx",GetDllStatus());
     return NULL;
 }