diff --git a/litex/build/efinix/efinity.py b/litex/build/efinix/efinity.py
index 0f782ac6b..e668f8700 100644
--- a/litex/build/efinix/efinity.py
+++ b/litex/build/efinix/efinity.py
@@ -164,6 +164,10 @@ class EfinityToolchain(GenericToolchain):
                 prop = "PULL_OPTION"
                 val = c.misc
 
+            if c.misc == "SCHMITT_TRIGGER":
+                prop = "SCHMITT_TRIGGER"
+                val = "1"
+
             if "DRIVE_STRENGTH" in c.misc:
                 prop = "DRIVE_STRENGTH"
                 val = c.misc.split("=")[1]
diff --git a/litex/build/efinix/platform.py b/litex/build/efinix/platform.py
index 9808369ef..4b5777aa9 100644
--- a/litex/build/efinix/platform.py
+++ b/litex/build/efinix/platform.py
@@ -109,6 +109,10 @@ class EfinixPlatform(GenericPlatform):
                                 prop = "PULL_OPTION"
                                 val = o.misc
                                 ret.append((prop, val))
+                            if o.misc == "SCHMITT_TRIGGER":
+                                prop = "SCHMITT_TRIGGER"
+                                val = "1"
+                                ret.append((prop, val))
                             if "DRIVE_STRENGTH" in o.misc:
                                 prop = "DRIVE_STRENGTH"
                                 val = o.misc.split("=")[1]