diff --git a/src/numpy/dtype.cpp b/src/numpy/dtype.cpp
old mode 100644
new mode 100755
index e0a22299..88a20a27
--- a/src/numpy/dtype.cpp
+++ b/src/numpy/dtype.cpp
@@ -62,7 +62,9 @@ BUILTIN_INT_DTYPE(8);
 BUILTIN_INT_DTYPE(16);
 BUILTIN_INT_DTYPE(32);
 BUILTIN_INT_DTYPE(64);
+#ifdef NPY_FLOAT16
 BUILTIN_FLOAT_DTYPE(16);
+#endif
 BUILTIN_FLOAT_DTYPE(32);
 BUILTIN_FLOAT_DTYPE(64);
 BUILTIN_COMPLEX_DTYPE(64);