diff --git a/include/fmt/core.h b/include/fmt/core.h
index 8e8d2f1c..897b52db 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -279,7 +279,7 @@
 
 // Enable minimal optimizations for more compact code in debug mode.
 FMT_GCC_PRAGMA("GCC push_options")
-#ifndef __OPTIMIZE__
+#if !defined(__OPTIMIZE__) && !defined(__NVCOMPILER)
 FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
 #endif
 
diff --git a/include/fmt/format.h b/include/fmt/format.h
index c4c9321d..f6a283ad 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -967,14 +967,17 @@ FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
 template <int BITS, typename UInt>
 FMT_CONSTEXPR auto count_digits(UInt n) -> int {
 #ifdef FMT_BUILTIN_CLZ
-  if (num_bits<UInt>() == 32)
+  if (num_bits<UInt>() == 32) {
     return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
+  } else
 #endif
-  int num_digits = 0;
-  do {
-    ++num_digits;
-  } while ((n >>= BITS) != 0);
-  return num_digits;
+  {
+    int num_digits = 0;
+    do {
+      ++num_digits;
+    } while ((n >>= BITS) != 0);
+    return num_digits;
+  }
 }
 
 template <> auto count_digits<4>(detail::fallback_uintptr n) -> int;