diff --git a/src/string/strcmp.c b/src/string/strcmp.c
new file mode 100644
index 0000000..616ffd1
--- /dev/null
+++ b/src/string/strcmp.c
@@ -0,0 +1,10 @@
+#include <stddef.h>
+
+int strcmp(const char *s1, const char *s2)
+{
+	size_t i = 0;
+
+	while (s1[i] == s2[i] && s1[i] != '\0')
+		i++;
+	return s1[i] - s2[i];
+}