diff --git a/c/unistd.lua b/c/unistd.lua
index dda159f..af43730 100644
--- a/c/unistd.lua
+++ b/c/unistd.lua
@@ -5,4 +5,23 @@ ffi.cdef[[
 int chdir(const char* path);
 extern char* getcwd(char* buf, size_t size);
 
+// in Windows in direct.h:
+int _chdir(const char* path);
+extern char* _getcwd(char* buf, size_t size);
+
 ]]
+
+-- I can't change ffi.C.getcwd to ffi.C._getcwd in the case of Windows
+-- but I can at least return a table that changes names depending on the OS:
+
+if ffi.os == 'Windows' then
+	return {
+		chdir = ffi.C._chdir,
+		getcwd = ffi.C._getcwd,
+	}
+else
+	return {
+		chdir = ffi.C.chdir,
+		getcwd = ffi.C.getcwd,
+	}
+end
diff --git a/imgui.lua b/imgui.lua
index d451097..c41e82c 100644
--- a/imgui.lua
+++ b/imgui.lua
@@ -115,7 +115,7 @@ local wrapper = setmetatable({
 		local label, v, step, step_fast, decimal_precision, extra_flags = ...
 		if n < 3 then step = 0 end
 		if n < 4 then step_fast = 0 end
-		if n < 5 then decimal_precision = -1 end
+		if n < 5 then decimal_precision = '%3f' end
 		if n < 6 then extra_flags = 0 end
 		return ig.igInputFloat(label, v, step, step_fast, decimal_precision, extra_flags)
 	end,