diff --git a/include/fmt/core.h b/include/fmt/core.h
index cbbc986f..6de0e386 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -34,13 +34,13 @@
 
 #ifdef __ICL
 #  define FMT_ICC_VERSION __ICL
-#  define FMT_ICC_ON_WINDOWS 1
+#  define FMT_ICC_POSIX 0
 #elif defined(__INTEL_COMPILER)
 #  define FMT_ICC_VERSION __INTEL_COMPILER
-#  define FMT_ICC_ON_WINDOWS 0
+#  define FMT_ICC_POSIX 1
 #else
 #  define FMT_ICC_VERSION 0
-#  define FMT_ICC_ON_WINDOWS 0
+#  define FMT_ICC_POSIX 1
 #endif
 
 #ifdef __NVCC__
diff --git a/include/fmt/format.h b/include/fmt/format.h
index dca6e146..c4acf2eb 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -166,12 +166,12 @@ FMT_END_NAMESPACE
 #  define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
 #endif
 #if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_ctz) || FMT_ICC_VERSION) && \
-    !FMT_ICC_ON_WINDOWS
+    FMT_ICC_POSIX
 #  define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
 #endif
 #if (FMT_GCC_VERSION || FMT_HAS_BUILTIN(__builtin_ctzll) || \
      FMT_ICC_VERSION) &&                                    \
-    !FMT_ICC_ON_WINDOWS
+    FMT_ICC_POSIX
 #  define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
 #endif
 
@@ -187,9 +187,6 @@ FMT_BEGIN_NAMESPACE
 namespace detail {
 // Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
 #  if !defined(__clang__)
-#    if !defined(__ICL)
-#       pragma managed(push, off)
-#    endif
 #    pragma intrinsic(_BitScanForward)
 #    pragma intrinsic(_BitScanReverse)
 #    if defined(_WIN64)
@@ -251,11 +248,6 @@ inline auto ctzll(uint64_t x) -> int {
   return static_cast<int>(r);
 }
 #  define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
-#  if !defined(__clang__)
-#      if !defined(__ICL)
-#        pragma managed(pop)
-#      endif
-#  endif
 }  // namespace detail
 FMT_END_NAMESPACE
 #endif