diff --git a/dlls/d3dx10_43/tests/d3dx10.c b/dlls/d3dx10_43/tests/d3dx10.c
index 8257ab1e919..e9c215d3c45 100644
--- a/dlls/d3dx10_43/tests/d3dx10.c
+++ b/dlls/d3dx10_43/tests/d3dx10.c
@@ -1120,6 +1120,13 @@ static ULONG get_refcount(void *iface)
     return IUnknown_Release(unknown);
 }
 
+static BOOL compare_uint(unsigned int x, unsigned int y, unsigned int max_diff)
+{
+    unsigned int diff = x > y ? x - y : y - x;
+
+    return diff <= max_diff;
+}
+
 static BOOL compare_float(float f, float g, unsigned int ulps)
 {
     int x = *(int *)&f;
@@ -1130,10 +1137,7 @@ static BOOL compare_float(float f, float g, unsigned int ulps)
     if (y < 0)
         y = INT_MIN - y;
 
-    if (abs(x - y) > ulps)
-        return FALSE;
-
-    return TRUE;
+    return compare_uint(x, y, ulps);
 }
 
 static char *get_str_a(const WCHAR *wstr)