diff --git a/src/value_parsing.jl b/src/value_parsing.jl
index d6d9bc99..e2c1bb69 100644
--- a/src/value_parsing.jl
+++ b/src/value_parsing.jl
@@ -20,7 +20,7 @@ function julia_string_to_number(str::AbstractString, kind)
         end
         return x
     elseif kind == K"Float"
-        if !startswith(str,"0x") && 'f' in str
+        if !startswith(str,"0x") && 'f' in str && !('p' in str)
             # This is kind of awful. Should we have a separate Float32 literal
             # type produced by the lexer?  The `f` suffix is nonstandard after all.
             return Base.parse(Float32, replace(str, 'f'=>'e'))
diff --git a/test/parser.jl b/test/parser.jl
index ec6005da..d40034cc 100644
--- a/test/parser.jl
+++ b/test/parser.jl
@@ -641,6 +641,7 @@ tests = [
         "```cmd```"  =>  "(macrocall :(Core.var\"@cmd\") \"cmd\")"
         # literals
         "42"   => "42"
+        "0x123456789abcdefp+0" => "8.19855292164869e16"
         # closing tokens
         ")"    => "(error)"
     ],