diff --git a/dlls/setupapi/install.c b/dlls/setupapi/install.c
index 902216e26ab..b53b2660b18 100644
--- a/dlls/setupapi/install.c
+++ b/dlls/setupapi/install.c
@@ -1024,7 +1024,7 @@ void WINAPI InstallHinfSectionW( HWND hwnd, HINSTANCE handle, LPCWSTR cmdline, I
     path=d=s;
     while (*s)
     {
-        if (*s==0 || ((*s=='\t' || *s==' ') && !in_quotes)) {
+        if (*s==0) {
             /* end of this command line argument */
             break;
         } else if (*s=='\\') {
diff --git a/dlls/setupapi/tests/install.c b/dlls/setupapi/tests/install.c
index 3f447dd51b4..5cecd97467d 100644
--- a/dlls/setupapi/tests/install.c
+++ b/dlls/setupapi/tests/install.c
@@ -121,7 +121,7 @@ static void test_cmdline(void)
     create_inf_file(infwithspaces, cmdline_inf);
 
     sprintf(path, "%s\\%s", CURR_DIR, infwithspaces);
-    todo_wine ok_cmdline("DefaultInstall", 128, path, TRUE);
+    ok_cmdline("DefaultInstall", 128, path, TRUE);
 
     sprintf(path, "\"%s\\%s\"", CURR_DIR, infwithspaces);
     todo_wine ok_cmdline("DefaultInstall", 128, path, FALSE);