diff --git a/fuzz/execl_override.c b/fuzz/execl_override.c
index 308bd73..275d4f0 100644
--- a/fuzz/execl_override.c
+++ b/fuzz/execl_override.c
@@ -10,7 +10,7 @@
 #include <wlr/render/wlr_renderer.h>
 
 int
-fork() {
+fork(void) {
 	return 1;
 }
 
diff --git a/fuzz/fuzz-lib.c b/fuzz/fuzz-lib.c
index 5211e05..38754f5 100644
--- a/fuzz/fuzz-lib.c
+++ b/fuzz/fuzz-lib.c
@@ -88,7 +88,7 @@ drop_permissions(void) {
 }
 
 void
-cleanup() {
+cleanup(void) {
 	server.running = false;
 #if CG_HAS_XWAYLAND
 	if(xwayland != NULL) {
diff --git a/fuzz/fuzz-lib.h b/fuzz/fuzz-lib.h
index 9254ced..46aefd2 100644
--- a/fuzz/fuzz-lib.h
+++ b/fuzz/fuzz-lib.h
@@ -21,7 +21,7 @@ extern struct wlr_xcursor_manager *xcursor_manager;
 #endif
 
 void
-cleanup();
+cleanup(void);
 
 int
 LLVMFuzzerInitialize(int *argc, char ***argv);
diff --git a/fuzz/fuzz-parse.c b/fuzz/fuzz-parse.c
index b0cb125..303c168 100644
--- a/fuzz/fuzz-parse.c
+++ b/fuzz/fuzz-parse.c
@@ -29,8 +29,7 @@
 int
 set_configuration(struct cg_server *server, char *content) {
 	char *line;
-	for(unsigned int line_num = 1;
-	    (line = strtok_r(NULL, "\n", &content)) != NULL; ++line_num) {
+	    while((line = strtok_r(NULL, "\n", &content)) != NULL) {
 		line[strcspn(line, "\n")] = '\0';
 		if(*line != '\0' && *line != '#') {
 			char *errstr = NULL;