diff --git a/compiler/rustc_infer/src/infer/mod.rs b/compiler/rustc_infer/src/infer/mod.rs
index cb5c976ac1c2d..3380f945241c6 100644
--- a/compiler/rustc_infer/src/infer/mod.rs
+++ b/compiler/rustc_infer/src/infer/mod.rs
@@ -1269,16 +1269,16 @@ impl<'tcx> InferCtxt<'tcx> {
 
                 ty::IntVar(v) => {
                     match self.inner.borrow_mut().int_unification_table().probe_value(v) {
-                        ty::IntVarValue::Unknown => ty,
                         ty::IntVarValue::IntType(ty) => Ty::new_int(self.tcx, ty),
                         ty::IntVarValue::UintType(ty) => Ty::new_uint(self.tcx, ty),
+                        ty::IntVarValue::Unknown => ty,
                     }
                 }
 
                 ty::FloatVar(v) => {
                     match self.inner.borrow_mut().float_unification_table().probe_value(v) {
-                        ty::FloatVarValue::Unknown => ty,
                         ty::FloatVarValue::Known(ty) => Ty::new_float(self.tcx, ty),
+                        ty::FloatVarValue::Unknown => ty,
                     }
                 }
 
@@ -1644,7 +1644,7 @@ impl<'tcx> InferCtxt<'tcx> {
                 // If `inlined_probe_value` returns a value it's always a
                 // `ty::Int(_)` or `ty::UInt(_)`, which never matches a
                 // `ty::Infer(_)`.
-                !self.inner.borrow_mut().int_unification_table().inlined_probe_value(v).is_unknown()
+                self.inner.borrow_mut().int_unification_table().inlined_probe_value(v).is_known()
             }
 
             TyOrConstInferVar::TyFloat(v) => {
@@ -1652,7 +1652,7 @@ impl<'tcx> InferCtxt<'tcx> {
                 // `ty::Float(_)`, which never matches a `ty::Infer(_)`.
                 //
                 // Not `inlined_probe_value(v)` because this call site is colder.
-                !self.inner.borrow_mut().float_unification_table().probe_value(v).is_unknown()
+                self.inner.borrow_mut().float_unification_table().probe_value(v).is_known()
             }
 
             TyOrConstInferVar::Const(v) => {
diff --git a/compiler/rustc_type_ir/src/ty_kind.rs b/compiler/rustc_type_ir/src/ty_kind.rs
index 28226f94fde54..ddff3a2478432 100644
--- a/compiler/rustc_type_ir/src/ty_kind.rs
+++ b/compiler/rustc_type_ir/src/ty_kind.rs
@@ -723,8 +723,15 @@ pub enum IntVarValue {
 }
 
 impl IntVarValue {
-    pub fn is_unknown(&self) -> bool {
-        matches!(self, IntVarValue::Unknown)
+    pub fn is_known(self) -> bool {
+        match self {
+            IntVarValue::IntType(_) | IntVarValue::UintType(_) => true,
+            IntVarValue::Unknown => false,
+        }
+    }
+
+    pub fn is_unknown(self) -> bool {
+        !self.is_known()
     }
 }
 
@@ -735,8 +742,15 @@ pub enum FloatVarValue {
 }
 
 impl FloatVarValue {
-    pub fn is_unknown(&self) -> bool {
-        matches!(self, FloatVarValue::Unknown)
+    pub fn is_known(self) -> bool {
+        match self {
+            FloatVarValue::Known(_) => true,
+            FloatVarValue::Unknown => false,
+        }
+    }
+
+    pub fn is_unknown(self) -> bool {
+        !self.is_known()
     }
 }