diff --git a/Userland/Libraries/LibC/unistd.cpp b/Userland/Libraries/LibC/unistd.cpp
index 8fd1acb93e..5d0fe6db68 100644
--- a/Userland/Libraries/LibC/unistd.cpp
+++ b/Userland/Libraries/LibC/unistd.cpp
@@ -409,7 +409,7 @@ char* getwd(char* buf)
     return p;
 }
 
-int sleep(unsigned seconds)
+unsigned int sleep(unsigned int seconds)
 {
     struct timespec ts = { seconds, 0 };
     if (clock_nanosleep(CLOCK_MONOTONIC_COARSE, 0, &ts, nullptr) < 0)
diff --git a/Userland/Libraries/LibC/unistd.h b/Userland/Libraries/LibC/unistd.h
index aca2197301..54dd27a891 100644
--- a/Userland/Libraries/LibC/unistd.h
+++ b/Userland/Libraries/LibC/unistd.h
@@ -106,7 +106,7 @@ int chdir(const char* path);
 int fchdir(int fd);
 char* getcwd(char* buffer, size_t size);
 char* getwd(char* buffer);
-int sleep(unsigned seconds);
+unsigned int sleep(unsigned int seconds);
 int usleep(useconds_t);
 int gethostname(char*, size_t);
 int sethostname(const char*, ssize_t);