diff --git a/src/database.rs b/src/database.rs
index fa9ed4e..7428476 100644
--- a/src/database.rs
+++ b/src/database.rs
@@ -126,13 +126,6 @@ extern fn process_callback<F>(callback: *mut c_void, count: c_int, values: *mut
                               columns: *mut *mut c_char) -> c_int
     where F: FnMut(&[(&str, Option<&str>)]) -> bool
 {
-    use std::str;
-    use std::ffi::CStr;
-
-    macro_rules! c_str_to_str(
-        ($string:expr) => (str::from_utf8(CStr::from_ptr($string).to_bytes()));
-    );
-
     unsafe {
         let mut pairs = Vec::with_capacity(count as usize);
 
diff --git a/src/lib.rs b/src/lib.rs
index 883d9fa..46d218a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -66,6 +66,17 @@ macro_rules! path_to_c_str(
     });
 );
 
+macro_rules! c_str_to_str(
+    ($string:expr) => (::std::str::from_utf8(::std::ffi::CStr::from_ptr($string).to_bytes()));
+);
+
+macro_rules! c_str_to_string(
+    ($string:expr) => (
+        String::from_utf8_lossy(::std::ffi::CStr::from_ptr($string as *const _).to_bytes())
+               .into_owned()
+    );
+);
+
 macro_rules! str_to_c_str(
     ($string:expr) => (
         match ::std::ffi::CString::new($string) {
@@ -75,13 +86,6 @@ macro_rules! str_to_c_str(
     );
 );
 
-macro_rules! c_str_to_string(
-    ($cstr:expr) => (
-        String::from_utf8_lossy(::std::ffi::CStr::from_ptr($cstr as *const _).to_bytes())
-               .into_owned()
-    );
-);
-
 mod database;
 mod error;
 mod statement;