diff --git a/clippy_lints/src/misc.rs b/clippy_lints/src/misc.rs
index 2e38bcd39eb6..3fb9101076da 100644
--- a/clippy_lints/src/misc.rs
+++ b/clippy_lints/src/misc.rs
@@ -362,16 +362,28 @@ fn is_allowed(cx: &LateContext, expr: &Expr) -> bool {
     let res = ConstContext::with_tables(cx.tcx, cx.tables).eval(expr);
     if let Ok(ConstVal::Float(val)) = res {
         use std::cmp::Ordering;
+        match val {
+            val @ ConstFloat::F32(_) => {
+                let zero = ConstFloat::F32(0.0);
 
-        let zero = ConstFloat::F64(0.0);
+                let infinity = ConstFloat::F32(::std::f32::INFINITY);
 
-        let infinity = ConstFloat::F64(::std::f64::INFINITY);
+                let neg_infinity = ConstFloat::F32(::std::f32::NEG_INFINITY);
 
+                val.try_cmp(zero) == Ok(Ordering::Equal) || val.try_cmp(infinity) == Ok(Ordering::Equal) ||
+                val.try_cmp(neg_infinity) == Ok(Ordering::Equal)
+            },
+            val @ ConstFloat::F64(_) => {
+                let zero = ConstFloat::F64(0.0);
 
-        let neg_infinity = ConstFloat::F64(::std::f64::NEG_INFINITY);
+                let infinity = ConstFloat::F64(::std::f64::INFINITY);
 
-        val.try_cmp(zero) == Ok(Ordering::Equal) || val.try_cmp(infinity) == Ok(Ordering::Equal) ||
-        val.try_cmp(neg_infinity) == Ok(Ordering::Equal)
+                let neg_infinity = ConstFloat::F64(::std::f64::NEG_INFINITY);
+
+                val.try_cmp(zero) == Ok(Ordering::Equal) || val.try_cmp(infinity) == Ok(Ordering::Equal) ||
+                val.try_cmp(neg_infinity) == Ok(Ordering::Equal)
+            }
+        }
     } else {
         false
     }