diff --git a/include/fmt/core.h b/include/fmt/core.h
index 9ddf94a5..1e8ecad1 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -49,12 +49,6 @@
 #  define FMT_ICC_VERSION 0
 #endif
 
-#ifdef __ibmxl__
-#  define FMT_XLC_VERSION __ibmxl_vrm__
-#else
-#  define FMT_XLC_VERSION 0
-#endif
-
 #ifdef _MSC_VER
 #  define FMT_MSC_VERSION _MSC_VER
 #  define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
diff --git a/include/fmt/format.h b/include/fmt/format.h
index 30ac38e4..f9bfd955 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -391,14 +391,11 @@ class uint128_fallback {
       hi_ += (lo_ < n ? 1 : 0);
       return *this;
     }
-#if FMT_XLC_VERSION && defined(_ARCH_PWR9)
-    lo_ = __addex(lo_, n, 0, &carry);
-    hi_ += carry;
-#elif FMT_HAS_BUILTIN(__builtin_addcll) && !FMT_XLC_VERSION
+#if FMT_HAS_BUILTIN(__builtin_addcll) && !defined(__ibmxl__)
     unsigned long long carry;
     lo_ = __builtin_addcll(lo_, n, 0, &carry);
     hi_ += carry;
-#elif FMT_HAS_BUILTIN(__builtin_ia32_addcarryx_u64) && !FMT_XLC_VERSION
+#elif FMT_HAS_BUILTIN(__builtin_ia32_addcarryx_u64) && !defined(__ibmxl__)
     unsigned long long result;
     auto carry = __builtin_ia32_addcarryx_u64(0, lo_, n, &result);
     lo_ = result;