diff --git a/dlls/propsys/propsys_main.c b/dlls/propsys/propsys_main.c
index ce9131b209d..8d05ad06d12 100644
--- a/dlls/propsys/propsys_main.c
+++ b/dlls/propsys/propsys_main.c
@@ -315,7 +315,7 @@ static BOOL string_to_guid(LPCWSTR s, LPGUID id)
 
 HRESULT WINAPI PSPropertyKeyFromString(LPCWSTR pszString, PROPERTYKEY *pkey)
 {
-    int has_minus = 0, has_comma = 0;
+    BOOL has_minus = FALSE, has_comma = FALSE;
 
     TRACE("(%s, %p)\n", debugstr_w(pszString), pkey);
 
@@ -341,7 +341,7 @@ HRESULT WINAPI PSPropertyKeyFromString(LPCWSTR pszString, PROPERTYKEY *pkey)
             if (has_comma)
                 return S_OK;
             else
-                has_comma = 1;
+                has_comma = TRUE;
         }
         pszString++;
     }
@@ -357,7 +357,7 @@ HRESULT WINAPI PSPropertyKeyFromString(LPCWSTR pszString, PROPERTYKEY *pkey)
     {
         if (*pszString == '-')
         {
-            has_minus = 1;
+            has_minus = TRUE;
             pszString++;
         }
     }
@@ -372,7 +372,7 @@ HRESULT WINAPI PSPropertyKeyFromString(LPCWSTR pszString, PROPERTYKEY *pkey)
 
         if (*pszString == '-')
         {
-            has_minus = 1;
+            has_minus = TRUE;
             pszString++;
         }