diff --git a/src/locale.cpp b/src/locale.cpp
index 148fe42..e626528 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -1038,7 +1038,7 @@
 #elif defined(_AIX)
     return (const unsigned int *)__lc_ctype_ptr->obj->mask;
 #elif defined(__ANDROID__)
-    return _ctype_ + 1;
+    return reinterpret_cast<const unsigned char*>(_ctype_) + 1;
 #else
     // Platform not supported: abort so the person doing the port knows what to
     // fix