diff --git a/src/print.jl b/src/print.jl
index 65d0c0b601f..4a0776a214f 100644
--- a/src/print.jl
+++ b/src/print.jl
@@ -80,7 +80,7 @@ end
 
 # Helper function that rounds carefully for the purposes of printing Reals
 # for example, 5.3  =>  5.3, and 1.0  =>  1
-function _string_round(mode, x::Union{Float32,Float64})
+function _string_round(mode::MIME, x::Union{Float32,Float64})
     if isinteger(x) && typemin(Int64) <= x <= typemax(Int64)
         return string(round(Int64, x))
     end
@@ -1054,7 +1054,7 @@ function in_set_string(mode::MIME, set::MOI.EqualTo)
     return string(_math_symbol(mode, :eq), " ", _string_round(mode, set.value))
 end
 
-function in_set_string(::MIME"text/latex", set::MOI.Interval)
+function in_set_string(mode::MIME"text/latex", set::MOI.Interval)
     lower = _string_round(mode, set.lower)
     upper = _string_round(mode, set.upper)
     return string("\\in [", lower, ", ", upper, "]")
diff --git a/test/test_print.jl b/test/test_print.jl
index 1966f86f4ae..8e758a61097 100644
--- a/test/test_print.jl
+++ b/test/test_print.jl
@@ -964,6 +964,10 @@ end
 
 function test_print_text_latex_interval_set()
     @test in_set_string(MIME("text/latex"), MOI.Interval(1, 2)) == "\\in [1, 2]"
+    @test in_set_string(MIME("text/latex"), MOI.Interval(1.0, 2.0)) ==
+          "\\in [1, 2]"
+    @test in_set_string(MIME("text/latex"), MOI.Interval(1.5, 2.5)) ==
+          "\\in [1.5, 2.5]"
     return
 end