diff --git a/src/context.rs b/src/context.rs
index 1febd27..e4ce95a 100644
--- a/src/context.rs
+++ b/src/context.rs
@@ -15,7 +15,7 @@ use types::{ToSqlOutput, ValueRef};
 use vtab::array::{free_array, ARRAY_TYPE};
 
 impl<'a> ValueRef<'a> {
-    pub unsafe fn from_value(value: *mut sqlite3_value) -> ValueRef<'a> {
+    pub(crate) unsafe fn from_value(value: *mut sqlite3_value) -> ValueRef<'a> {
         use std::slice::from_raw_parts;
 
         match ffi::sqlite3_value_type(value) {
@@ -63,7 +63,7 @@ impl<'a> ValueRef<'a> {
     }
 }
 
-pub unsafe fn set_result<'a>(ctx: *mut sqlite3_context, result: &ToSqlOutput<'a>) {
+pub(crate) unsafe fn set_result<'a>(ctx: *mut sqlite3_context, result: &ToSqlOutput<'a>) {
     let value = match *result {
         ToSqlOutput::Borrowed(v) => v,
         ToSqlOutput::Owned(ref v) => ValueRef::from(v),
diff --git a/src/vtab/mod.rs b/src/vtab/mod.rs
index 4c0b5fd..4c602e9 100644
--- a/src/vtab/mod.rs
+++ b/src/vtab/mod.rs
@@ -727,7 +727,7 @@ pub unsafe fn cursor_error<T>(cursor: *mut ffi::sqlite3_vtab_cursor, result: Res
 }
 
 /// Virtual tables methods can set an error message by assigning a string to `zErrMsg`.
-pub unsafe fn set_err_msg(vtab: *mut ffi::sqlite3_vtab, err_msg: &str) {
+unsafe fn set_err_msg(vtab: *mut ffi::sqlite3_vtab, err_msg: &str) {
     if !(*vtab).zErrMsg.is_null() {
         ffi::sqlite3_free((*vtab).zErrMsg as *mut c_void);
     }