diff --git a/libstdc++-v3/config/os/newlib/ctype_inline.h b/libstdc++-v3/config/os/newlib/ctype_inline.h
index a4714f9bcce..479ceef7191 100644
--- a/libstdc++-v3/config/os/newlib/ctype_inline.h
+++ b/libstdc++-v3/config/os/newlib/ctype_inline.h
@@ -34,6 +34,26 @@
 // ctype bits to be inlined go here. Non-inlinable (ie virtual do_*)
 // functions go in ctype.cc
 
+#ifndef __ctype__pgm_read_with_offset
+
+#define __ctype__pgm_read_with_offset(addr, res) \
+  asm("extui    %0, %1, 0, 2\n"     /* Extract offset within word (in bytes) */ \
+      "sub      %1, %1, %0\n"       /* Subtract offset from addr, yielding an aligned address */ \
+      "l32i.n   %1, %1, 0x0\n"      /* Load word from aligned address */ \
+      "ssa8l    %0\n"               /* Prepare to shift by offset (in bits) */ \
+      "src      %0, %1, %1\n"       /* Shift right; now the requested byte is the first one */ \
+      :"=r"(res), "=r"(addr) \
+      :"1"(addr) \
+:);
+
+static inline uint8_t __ctype__pgm_read_byte_inlined(const void* addr) {
+  register uint32_t res;
+  __ctype__pgm_read_with_offset(addr, res);
+  return (uint8_t) res;     /* This masks the lower byte from the returned word */
+}
+
+#endif
+
 namespace std _GLIBCXX_VISIBILITY(default)
 {
 _GLIBCXX_BEGIN_NAMESPACE_VERSION
@@ -41,14 +61,14 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   bool
   ctype<char>::
   is(mask __m, char __c) const
-  { return _M_table[static_cast<unsigned char>(__c)] & __m; }
+  { return __ctype__pgm_read_byte_inlined(&_M_table[static_cast<unsigned char>(__c)]) & __m; }
 
   const char*
   ctype<char>::
   is(const char* __low, const char* __high, mask* __vec) const
   {
     while (__low < __high)
-      *__vec++ = _M_table[static_cast<unsigned char>(*__low++)];
+      *__vec++ = __ctype__pgm_read_byte_inlined(&_M_table[static_cast<unsigned char>(*__low++)]);
     return __high;
   }