diff --git a/artiq/gateware/eem.py b/artiq/gateware/eem.py
index 467f3cae2..c3d3a71b5 100644
--- a/artiq/gateware/eem.py
+++ b/artiq/gateware/eem.py
@@ -259,25 +259,25 @@ class Sampler(_EEM):
         ios = [
             ("sampler{}_adc_spi_p".format(eem), 0,
                 Subsignal("clk", Pins(_eem_pin(eem, 0, "p"))),
-                Subsignal("miso", Pins(_eem_pin(eem, 1, "p"))),
+                Subsignal("miso", Pins(_eem_pin(eem, 1, "p")), Misc("DIFF_TERM=TRUE")),
                 iostandard(eem),
             ),
             ("sampler{}_adc_spi_n".format(eem), 0,
                 Subsignal("clk", Pins(_eem_pin(eem, 0, "n"))),
-                Subsignal("miso", Pins(_eem_pin(eem, 1, "n"))),
+                Subsignal("miso", Pins(_eem_pin(eem, 1, "n")), Misc("DIFF_TERM=TRUE")),
                 iostandard(eem),
             ),
             ("sampler{}_pgia_spi_p".format(eem), 0,
                 Subsignal("clk", Pins(_eem_pin(eem, 4, "p"))),
                 Subsignal("mosi", Pins(_eem_pin(eem, 5, "p"))),
-                Subsignal("miso", Pins(_eem_pin(eem, 6, "p"))),
+                Subsignal("miso", Pins(_eem_pin(eem, 6, "p")), Misc("DIFF_TERM=TRUE")),
                 Subsignal("cs_n", Pins(_eem_pin(eem, 7, "p"))),
                 iostandard(eem),
             ),
             ("sampler{}_pgia_spi_n".format(eem), 0,
                 Subsignal("clk", Pins(_eem_pin(eem, 4, "n"))),
                 Subsignal("mosi", Pins(_eem_pin(eem, 5, "n"))),
-                Subsignal("miso", Pins(_eem_pin(eem, 6, "n"))),
+                Subsignal("miso", Pins(_eem_pin(eem, 6, "n")), Misc("DIFF_TERM=TRUE")),
                 Subsignal("cs_n", Pins(_eem_pin(eem, 7, "n"))),
                 iostandard(eem),
             ),
@@ -633,14 +633,14 @@ class Mirny(_EEM):
             ("mirny{}_spi_p".format(eem), 0,
                 Subsignal("clk", Pins(_eem_pin(eem, 0, "p"))),
                 Subsignal("mosi", Pins(_eem_pin(eem, 1, "p"))),
-                Subsignal("miso", Pins(_eem_pin(eem, 2, "p"))),
+                Subsignal("miso", Pins(_eem_pin(eem, 2, "p")), Misc("DIFF_TERM=TRUE")),
                 Subsignal("cs_n", Pins(_eem_pin(eem, 3, "p"))),
                 iostandard(eem),
             ),
             ("mirny{}_spi_n".format(eem), 0,
                 Subsignal("clk", Pins(_eem_pin(eem, 0, "n"))),
                 Subsignal("mosi", Pins(_eem_pin(eem, 1, "n"))),
-                Subsignal("miso", Pins(_eem_pin(eem, 2, "n"))),
+                Subsignal("miso", Pins(_eem_pin(eem, 2, "n")), Misc("DIFF_TERM=TRUE")),
                 Subsignal("cs_n", Pins(_eem_pin(eem, 3, "n"))),
                 iostandard(eem),
             ),