diff --git a/dlls/vbscript/interp.c b/dlls/vbscript/interp.c
index f648f073bc8..173335062f5 100644
--- a/dlls/vbscript/interp.c
+++ b/dlls/vbscript/interp.c
@@ -416,6 +416,7 @@ static int stack_pop_bool(exec_ctx_t *ctx, BOOL *b)
 {
     variant_val_t val;
     HRESULT hres;
+    VARIANT_BOOL vb;
 
     hres = stack_pop_val(ctx, &val);
     if(FAILED(hres))
@@ -436,6 +437,12 @@ static int stack_pop_bool(exec_ctx_t *ctx, BOOL *b)
     case VT_I4:
         *b = V_I4(val.v);
         break;
+    case VT_BSTR:
+        hres = VarBoolFromStr(V_BSTR(val.v), ctx->script->lcid, 0, &vb);
+        if(FAILED(hres))
+            return hres;
+        *b=vb;
+        break;
     default:
         FIXME("unsupported for %s\n", debugstr_variant(val.v));
         release_val(&val);
diff --git a/dlls/vbscript/tests/lang.vbs b/dlls/vbscript/tests/lang.vbs
index d7865301784..ceaf63f7e8d 100644
--- a/dlls/vbscript/tests/lang.vbs
+++ b/dlls/vbscript/tests/lang.vbs
@@ -357,6 +357,22 @@ while empty
    ok false, "while empty executed"
 wend
 
+x = 0
+if "0" then
+   ok false, "if ""0"" executed"
+else
+   x = 1
+end if
+Call ok(x = 1, "if ""0"" else not executed")
+
+x = 0
+if "-1" then
+   x = 1
+else
+   ok false, "if ""-1"" else executed"
+end if
+Call ok(x = 1, "if ""-1"" not executed")
+
 x = 0
 WHILE x < 3 : x = x + 1 : Wend
 Call ok(x = 3, "x not equal to 3")