diff --git a/wsjtx/CMakeLists.txt b/wsjtx/CMakeLists.txt
index dcc2b59..6bcb569 100644
--- a/wsjtx/CMakeLists.txt
+++ b/wsjtx/CMakeLists.txt
@@ -949,7 +949,7 @@ endif ()
 #
 # Fortran setup
 #
-set (General_FFLAGS "-Wall -Wno-conversion -fno-second-underscore")
+set (General_FFLAGS "-Wall -Wno-conversion -fno-second-underscore -fallow-argument-mismatch")
 
 # FFLAGS depend on the compiler
 get_filename_component (Fortran_COMPILER_NAME ${CMAKE_Fortran_COMPILER} NAME)