diff --git a/platform.d b/platform.d
index b207155..79bce1f 100644
--- a/platform.d
+++ b/platform.d
@@ -475,7 +475,7 @@ ExecLocation(T)()
 }
 
 auto
-Cwd(T)()
+Cwd(T = string)()
 {
 	static char[512] buf;
 
@@ -487,7 +487,7 @@ Cwd(T)()
 	}
 	else static if(is(T: string))
 	{
-		return ConvToStr(buf)[0 .. strlen(buf.ptr)];
+		return ConvToStr(buf[0 .. strlen(buf.ptr)]);
 	}
 }
 
diff --git a/util.d b/util.d
index 40c17e9..d93cfd5 100644
--- a/util.d
+++ b/util.d
@@ -14,7 +14,7 @@ import std.traits;
 import core.stdc.string : memset;
 import core.simd;
 
-enum bool StringType(T)     = (is(T: string) || is(T: u8[]) || is(T: char[]));
+enum bool StringType(T)     = (is(T: string) || is(T: u8[]) || is(T: char[]) || is(T: const(char)[]));
 
 pragma(inline) void
 Int3()
@@ -45,7 +45,7 @@ Assert(T)(T cond, string msg)
 }
 
 string
-Str(T)(T[] arr)
+Str(T)(T arr) if(StringType!(T))
 {
 	return (cast(immutable(char)*)arr.ptr)[0 .. arr.length];
 }