diff --git a/Makefile.rule b/Makefile.rule
index 00c7c07cc..24b34d1c2 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -309,7 +309,7 @@ COMMON_PROF = -pg
 # BUILD_BFLOAT16 = 1
 
 # If you want to enable the experimental HFLOAT16 support
-BUILD_HFLOAT16 = 1
+# BUILD_HFLOAT16 = 1
 
 # Set the thread number threshold beyond which the job array for the threaded level3 BLAS
 # will be allocated on the heap rather than the stack. (This array alone requires