diff --git a/GNUmakefile b/GNUmakefile
index a68ea05..6d29486 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -3,6 +3,8 @@
 ### ------------------------------------------------------
 AMREX_HOME ?= ../amrex
 
+BL_NO_FORT = TRUE
+
 PRECISION = FLOAT
 PRECISION = DOUBLE