diff --git a/include/dstring/dstring.h b/include/dstring/dstring.h
index 336a420..ce8d7d6 100644
--- a/include/dstring/dstring.h
+++ b/include/dstring/dstring.h
@@ -14,6 +14,7 @@ void dstr_append(dstr_t **dst, char c);
 void dstr_resize(dstr_t **str);
 void dstr_clear(dstr_t *str);
 void dstr_print(const dstr_t *str);
+i64 dstr_find(const dstr_t *str, const char *substr);
 u64 dstr_length(const dstr_t *str);
 u64 dstr_capacity(const dstr_t *str);
 const char *dstr_to_cstr(const dstr_t *str);
diff --git a/src/dstring/dstring.c b/src/dstring/dstring.c
index ebb541a..f6dd3d7 100644
--- a/src/dstring/dstring.c
+++ b/src/dstring/dstring.c
@@ -155,6 +155,37 @@ void dstr_print(const dstr_t *str) {
   printf("%s\n", str->buf);
 }
 
+i64 dstr_find(const dstr_t *str, const char *substr) {
+  if (!str || !substr) {
+    return -1;
+  }
+
+  u64 substr_length = strlen(substr);
+
+  if (substr_length == 0 || substr_length > str->size) {
+    return -1;
+  }
+
+  char buf[substr_length + 1];
+  memset(buf, 0, substr_length + 1);
+
+  for (i64 i = 0; i < str->size; ++i) {
+    if (i + substr_length >= str->size) {
+      break;
+    }
+
+    for (u64 j = 0; j < substr_length; ++j) {
+      buf[j] = str->buf[i + j];
+    }
+
+    if (strcmp(buf, substr) == 0) {
+      return i;
+    }
+  }
+
+  return -1;
+}
+
 u64 dstr_length(const dstr_t *str) {
   if (!str) {
     return 0;