diff --git a/mpich.spec b/mpich.spec
index eb36fa9..acb4019 100644
--- a/mpich.spec
+++ b/mpich.spec
@@ -124,7 +124,8 @@ CONFIGURE_OPTS=(
         --with-hwloc-prefix=system
 )
 
-%configure "${CONFIGURE_OPTS[@]}"
+# Set -fallow-argument-mismatch for #1795817
+%configure "${CONFIGURE_OPTS[@]}" FFLAGS="$FFLAGS -fallow-argument-mismatch"
 
 # Remove rpath
 sed -r -i 's|^hardcode_libdir_flag_spec=.*|hardcode_libdir_flag_spec=""|g' libtool