diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ed6fc02f..1365a9aee 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 2.8.5)
 project(sway C)
 set(CMAKE_C_FLAGS "-g")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "bin/")
-add_definitions("-Wall")
+add_definitions("-Wall -Wextra -Wno-unused-parameter")
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMake)
 
 find_package(XKBCommon REQUIRED)
diff --git a/include/log.h b/include/log.h
index 47a83321d..3d77769c2 100644
--- a/include/log.h
+++ b/include/log.h
@@ -10,10 +10,10 @@ typedef enum {
 	L_DEBUG = 3,
 } log_importance_t;
 
-void init_log(int verbosity);
+void init_log(log_importance_t verbosity);
 void sway_log_colors(int mode);
-void sway_log(int verbosity, const char* format, ...) __attribute__((format(printf,2,3)));
-void sway_log_errno(int verbosity, char* format, ...) __attribute__((format(printf,2,3)));
+void sway_log(log_importance_t verbosity, const char* format, ...) __attribute__((format(printf,2,3)));
+void sway_log_errno(log_importance_t verbosity, char* format, ...) __attribute__((format(printf,2,3)));
 void sway_abort(const char* format, ...) __attribute__((format(printf,1,2)));
 bool sway_assert(bool condition, const char* format, ...) __attribute__((format(printf,2,3)));
 
diff --git a/sway/commands.c b/sway/commands.c
index cb96703ed..e90a40a3a 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -106,7 +106,7 @@ static bool cmd_bindsym(struct sway_config *config, int argc, char **argv) {
 		// Check for a modifier key
 		int j;
 		bool is_mod = false;
-		for (j = 0; j < sizeof(modifiers) / sizeof(struct modifier_key); ++j) {
+		for (j = 0; j < (int)(sizeof(modifiers) / sizeof(struct modifier_key)); ++j) {
 			if (strcasecmp(modifiers[j].name, split->items[i]) == 0) {
 				binding->modifiers |= modifiers[j].mod;
 				is_mod = true;
@@ -261,7 +261,7 @@ static bool cmd_floating_mod(struct sway_config *config, int argc, char **argv)
 
 	// set modifer keys
 	for (i = 0; i < split->length; ++i) {
-		for (j = 0; j < sizeof(modifiers) / sizeof(struct modifier_key); ++j) {
+		for (j = 0; j < (int)(sizeof(modifiers) / sizeof(struct modifier_key)); ++j) {
 			if (strcasecmp(modifiers[j].name, split->items[i]) == 0) {
 				config->floating_mod |= modifiers[j].mod;
 			}
diff --git a/sway/config.c b/sway/config.c
index 0afb02051..1ebd95ff8 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -107,7 +107,7 @@ static char *get_config_path() {
 
 	char *test = NULL;
 	int i;
-	for (i = 0; i < sizeof(search_paths) / sizeof(char *); ++i) {
+	for (i = 0; i < (int)(sizeof(search_paths) / sizeof(char *)); ++i) {
 		test = strdup(search_paths[i]);
 		test = do_var_replacement(temp_config, test);
 		sway_log(L_DEBUG, "Checking for config at %s", test);
diff --git a/sway/ipc.c b/sway/ipc.c
index 63117defc..0b36d7582 100644
--- a/sway/ipc.c
+++ b/sway/ipc.c
@@ -121,11 +121,15 @@ int ipc_client_handle_readable(int client_fd, uint32_t mask, void *data) {
 	}
 
 	int read_available;
-	ioctl(client_fd, FIONREAD, &read_available);
+	if (ioctl(client_fd, FIONREAD, &read_available) == -1) {
+		sway_log_errno(L_INFO, "Unable to read IPC socket buffer size");
+		ipc_client_disconnect(client);
+		return 0;
+	}
 
 	// Wait for the rest of the command payload in case the header has already been read
 	if (client->payload_length > 0) {
-		if (read_available >= client->payload_length) {
+		if ((uint32_t)read_available >= client->payload_length) {
 			ipc_client_handle_command(client);
 		}
 		else {
diff --git a/sway/layout.c b/sway/layout.c
index 7eaa9ea4b..573c6f708 100644
--- a/sway/layout.c
+++ b/sway/layout.c
@@ -114,7 +114,7 @@ void move_container(swayc_t *container,swayc_t* root,enum movement_direction dir
 	sway_log(L_DEBUG, "Moved window");
 	swayc_t *temp;
 	int i;
-	uint clength = root->children->length;
+	int clength = root->children->length;
 	//Rearrange
 	for (i = 0; i < clength; ++i) {
 		swayc_t *child = root->children->items[i];
diff --git a/sway/log.c b/sway/log.c
index e0734109e..a1e89bade 100644
--- a/sway/log.c
+++ b/sway/log.c
@@ -10,7 +10,7 @@
 #include <string.h>
 
 int colored = 1;
-int v = 0;
+log_importance_t v = L_SILENT;
 
 static const char *verbosity_colors[] = {
 	"", // L_SILENT
@@ -19,7 +19,7 @@ static const char *verbosity_colors[] = {
 	"\x1B[1;30m", // L_DEBUG
 };
 
-void init_log(int verbosity) {
+void init_log(log_importance_t verbosity) {
 	v = verbosity;
 	/* set FD_CLOEXEC flag to prevent programs called with exec to write into logs */
 	int i;
@@ -46,9 +46,9 @@ void sway_abort(const char *format, ...) {
 	sway_terminate();
 }
 
-void sway_log(int verbosity, const char* format, ...) {
+void sway_log(log_importance_t verbosity, const char* format, ...) {
 	if (verbosity <= v) {
-		int c = verbosity;
+		unsigned int c = verbosity;
 		if (c > sizeof(verbosity_colors) / sizeof(char *)) {
 			c = sizeof(verbosity_colors) / sizeof(char *) - 1;
 		}
@@ -69,9 +69,9 @@ void sway_log(int verbosity, const char* format, ...) {
 	}
 }
 
-void sway_log_errno(int verbosity, char* format, ...) {
+void sway_log_errno(log_importance_t verbosity, char* format, ...) {
 	if (verbosity <= v) {
-		int c = verbosity;
+		unsigned int c = verbosity;
 		if (c > sizeof(verbosity_colors) / sizeof(char *)) {
 			c = sizeof(verbosity_colors) / sizeof(char *) - 1;
 		}