diff --git a/client/client_shared.c b/client/client_shared.c
index 97ee5660..c668c9f4 100644
--- a/client/client_shared.c
+++ b/client/client_shared.c
@@ -756,8 +756,9 @@ int client_config_line_proc(struct mosq_config *cfg, int pub_or_sub, int argc, c
 
 				tmp = strchr(url, '@');
 				if(tmp) {
+					char *colon;
 					*tmp++ = 0;
-					char *colon = strchr(url, ':');
+					colon = strchr(url, ':');
 					if(colon) {
 						*colon = 0;
 						cfg->password = strdup(colon + 1);
diff --git a/config.h b/config.h
index bdce7469..9f614f8c 100644
--- a/config.h
+++ b/config.h
@@ -33,6 +33,15 @@
 #if defined(_MSC_VER) && _MSC_VER < 1900
 #  define snprintf sprintf_s
 #  define EPROTO ECONNABORTED
+#  ifndef ECONNABORTED
+#    define ECONNABORTED WSAECONNABORTED
+#  endif
+#  ifndef ENOTCONN
+#    define ENOTCONN WSAENOTCONN
+#  endif
+#  ifndef ECONNREFUSED
+#    define ECONNREFUSED WSAECONNREFUSED
+#  endif
 #endif
 
 #ifdef WIN32
diff --git a/include/mosquitto.h b/include/mosquitto.h
index e7e09d70..9822b934 100644
--- a/include/mosquitto.h
+++ b/include/mosquitto.h
@@ -49,7 +49,7 @@ extern "C" {
 #  define libmosq_EXPORT
 #endif
 
-#if defined(_MSC_VER) && _MSC_VER < 1900
+#if defined(_MSC_VER) && _MSC_VER < 1900 && !defined(bool)
 #	ifndef __cplusplus
 #		define bool char
 #		define true 1
diff --git a/lib/misc_mosq.c b/lib/misc_mosq.c
index 8f2f2d2a..b2118c46 100644
--- a/lib/misc_mosq.c
+++ b/lib/misc_mosq.c
@@ -57,6 +57,8 @@ FILE *mosquitto__fopen(const char *path, const char *mode, bool restrict_read)
 			DWORD ulen = UNLEN;
 			SECURITY_DESCRIPTOR sd;
 			DWORD dwCreationDisposition;
+			int fd;
+			FILE *fptr;
 
 			switch(mode[0]){
 				case 'a':
@@ -97,12 +99,12 @@ FILE *mosquitto__fopen(const char *path, const char *mode, bool restrict_read)
 
 			LocalFree(pacl);
 
-			int fd = _open_osfhandle((intptr_t)hfile, 0);
+			fd = _open_osfhandle((intptr_t)hfile, 0);
 			if (fd < 0) {
 				return NULL;
 			}
 
-			FILE *fptr = _fdopen(fd, mode);
+			fptr = _fdopen(fd, mode);
 			if (!fptr) {
 				_close(fd);
 				return NULL;
diff --git a/lib/net_mosq.h b/lib/net_mosq.h
index 30342179..9feae613 100644
--- a/lib/net_mosq.h
+++ b/lib/net_mosq.h
@@ -36,6 +36,9 @@ typedef SSIZE_T ssize_t;
 #  define COMPAT_ECONNRESET WSAECONNRESET
 #  define COMPAT_EINTR WSAEINTR
 #  define COMPAT_EWOULDBLOCK WSAEWOULDBLOCK
+#  ifndef EINPROGRESS
+#    define EINPROGRESS WSAEINPROGRESS
+#  endif
 #else
 #  define COMPAT_CLOSE(a) close(a)
 #  define COMPAT_ECONNRESET ECONNRESET
diff --git a/lib/time_mosq.c b/lib/time_mosq.c
index e8eb0755..da4a9154 100644
--- a/lib/time_mosq.c
+++ b/lib/time_mosq.c
@@ -24,7 +24,9 @@ Contributors:
 #endif
 
 #ifdef WIN32
+#if !(defined(_MSC_VER) && _MSC_VER <= 1500)
 #  define _WIN32_WINNT _WIN32_WINNT_VISTA
+#endif
 #  include <windows.h>
 #else
 #  include <unistd.h>
diff --git a/src/conf.c b/src/conf.c
index bc4158ae..ae867732 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -2028,15 +2028,16 @@ static int config__read_file_core(struct mosquitto__config *config, bool reload,
 #endif
 				}else if(!strcmp(token, "topic")){
 #ifdef WITH_BRIDGE
+					char *topic = NULL;
+					enum mosquitto__bridge_direction direction = bd_out;
+					uint8_t qos = 0;
+					char *local_prefix = NULL, *remote_prefix = NULL;
+
 					if(reload) continue; /* FIXME */
 					if(!cur_bridge){
 						log__printf(NULL, MOSQ_LOG_ERR, "Error: Invalid bridge configuration.");
 						return MOSQ_ERR_INVAL;
 					}
-					char *topic = NULL;
-					enum mosquitto__bridge_direction direction = bd_out;
-					uint8_t qos = 0;
-					char *local_prefix = NULL, *remote_prefix = NULL;
 
 					token = strtok_r(NULL, " ", &saveptr);
 					if(token){