diff --git a/ChangeLog b/ChangeLog
index 6bb855b43..ea903833f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2013-01-13  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	Fix compilation with older compilers.
+
+	* grub-core/Makefile.core.def (mpi): Add mpi-inline.c.
+	* grub-core/lib/libgcrypt_wrap/cipher_wrap.h: Remove redundant
+	declarations.
+	* grub-core/lib/posix_wrap/string.h: Include sys/types.h.
+	* grub-core/lib/posix_wrap/sys/types.h: Add common types.
+	* grub-core/lib/xzembed/xz_dec_lzma2.c (dict_put): Replace byte
+	identifier with b.
+	* grub-core/lib/xzembed/xz_dec_stream.c (dec_vli): Likewise.
+	* include/grub/crypto.h: Add type defines.
+	* util/import_gcrypth.sed: Remove duplicate type defines.
+
 2013-01-13  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	New command list_trusted.
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 588e4cd25..f4dd645db 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -1874,6 +1874,7 @@ module = {
   common = lib/libgcrypt-grub/mpi/mpih-div.c;
   common = lib/libgcrypt-grub/mpi/mpicoder.c;
   common = lib/libgcrypt-grub/mpi/mpih-rshift.c;
+  common = lib/libgcrypt-grub/mpi/mpi-inline.c;
   common = lib/libgcrypt_wrap/mem.c;
 
   cflags = '$(CFLAGS_GCRY) -Wno-redundant-decls -Wno-sign-compare';
diff --git a/grub-core/lib/libgcrypt_wrap/cipher_wrap.h b/grub-core/lib/libgcrypt_wrap/cipher_wrap.h
index d7ae274a6..118b2f15c 100644
--- a/grub-core/lib/libgcrypt_wrap/cipher_wrap.h
+++ b/grub-core/lib/libgcrypt_wrap/cipher_wrap.h
@@ -34,12 +34,6 @@
 #undef __GNU_LIBRARY__
 #define __GNU_LIBRARY__ 1
 
-typedef grub_uint64_t u64;
-typedef grub_uint32_t u32;
-typedef grub_uint16_t u16;
-typedef grub_uint8_t byte;
-typedef grub_size_t size_t;
-
 #define U64_C(c) (c ## ULL)
 
 #define PUBKEY_FLAG_NO_BLINDING    (1 << 0)
diff --git a/grub-core/lib/posix_wrap/string.h b/grub-core/lib/posix_wrap/string.h
index 885845b5e..53ef0a9a7 100644
--- a/grub-core/lib/posix_wrap/string.h
+++ b/grub-core/lib/posix_wrap/string.h
@@ -20,6 +20,7 @@
 #define GRUB_POSIX_STRING_H	1
 
 #include <grub/misc.h>
+#include <sys/types.h>
 
 #define HAVE_STRCASECMP 1
 
@@ -49,7 +50,7 @@ memcpy (void *dest, const void *src, grub_size_t n)
 }
 
 static inline int
-memcmp (const void *s1, const void *s2, size_t n)
+memcmp (const void *s1, const void *s2, grub_size_t n)
 {
   return grub_memcmp (s1, s2, n);
 }
diff --git a/grub-core/lib/posix_wrap/sys/types.h b/grub-core/lib/posix_wrap/sys/types.h
index fe75d8d8c..62a26728d 100644
--- a/grub-core/lib/posix_wrap/sys/types.h
+++ b/grub-core/lib/posix_wrap/sys/types.h
@@ -44,6 +44,12 @@ typedef grub_int64_t int64_t;
 
 #define HAVE_U64_TYPEDEF 1
 typedef grub_uint64_t u64;
+#define HAVE_U32_TYPEDEF 1
+typedef grub_uint32_t u32;
+#define HAVE_U16_TYPEDEF 1
+typedef grub_uint16_t u16;
+#define HAVE_BYTE_TYPEDEF 1
+typedef grub_uint8_t byte;
 
 #define SIZEOF_UNSIGNED_LONG GRUB_CPU_SIZEOF_LONG
 #define SIZEOF_UNSIGNED_INT 4
diff --git a/grub-core/lib/xzembed/xz_dec_lzma2.c b/grub-core/lib/xzembed/xz_dec_lzma2.c
index 7899e9e87..4f4fb8545 100644
--- a/grub-core/lib/xzembed/xz_dec_lzma2.c
+++ b/grub-core/lib/xzembed/xz_dec_lzma2.c
@@ -327,9 +327,9 @@ static inline uint32_t dict_get(
 /*
  * Put one byte into the dictionary. It is assumed that there is space for it.
  */
-static inline void dict_put(struct dictionary *dict, uint8_t byte)
+static inline void dict_put(struct dictionary *dict, uint8_t b)
 {
-	dict->buf[dict->pos++] = byte;
+	dict->buf[dict->pos++] = b;
 
 	if (dict->full < dict->pos)
 		dict->full = dict->pos;
diff --git a/grub-core/lib/xzembed/xz_dec_stream.c b/grub-core/lib/xzembed/xz_dec_stream.c
index 6170b0c5c..f5a86ebfc 100644
--- a/grub-core/lib/xzembed/xz_dec_stream.c
+++ b/grub-core/lib/xzembed/xz_dec_stream.c
@@ -197,20 +197,20 @@ static bool fill_temp(struct xz_dec *s, struct xz_buf *b)
 static enum xz_ret dec_vli(struct xz_dec *s,
 		const uint8_t *in, size_t *in_pos, size_t in_size)
 {
-	uint8_t byte;
+	uint8_t b;
 
 	if (s->pos == 0)
 		s->vli = 0;
 
 	while (*in_pos < in_size) {
-		byte = in[*in_pos];
+		b = in[*in_pos];
 		++*in_pos;
 
-		s->vli |= (vli_type)(byte & 0x7F) << s->pos;
+		s->vli |= (vli_type)(b & 0x7F) << s->pos;
 
-		if ((byte & 0x80) == 0) {
+		if ((b & 0x80) == 0) {
 			/* Don't allow non-minimal encodings. */
-			if (byte == 0 && s->pos != 0)
+			if (b == 0 && s->pos != 0)
 				return XZ_DATA_ERROR;
 
 			s->pos = 0;
diff --git a/include/grub/crypto.h b/include/grub/crypto.h
index 557b944d2..ea2f13e54 100644
--- a/include/grub/crypto.h
+++ b/include/grub/crypto.h
@@ -66,9 +66,10 @@ typedef enum
     GPG_ERR_WRONG_PUBKEY_ALGO,
     GPG_ERR_OUT_OF_MEMORY,
     GPG_ERR_TOO_LARGE
-  } gcry_err_code_t;
-#define gpg_err_code_t gcry_err_code_t
-#define gpg_error_t gcry_err_code_t
+  } gpg_err_code_t;
+typedef gpg_err_code_t gpg_error_t;
+typedef gpg_error_t gcry_error_t;
+typedef gpg_err_code_t gcry_err_code_t;
 #define gcry_error_t gcry_err_code_t
 #if 0
 enum gcry_cipher_modes 
@@ -174,6 +175,7 @@ typedef struct gcry_md_spec
   struct gcry_md_spec *next;
 } gcry_md_spec_t;
 
+struct gcry_mpi;
 typedef struct gcry_mpi *gcry_mpi_t;
 
 /* Type for the pk_generate function.  */
diff --git a/util/import_gcrypth.sed b/util/import_gcrypth.sed
index dead8e60e..6cb53cf96 100644
--- a/util/import_gcrypth.sed
+++ b/util/import_gcrypth.sed
@@ -8,5 +8,8 @@
 /^# *include <sys\/socket\.h>/ d
 /^# *include <sys\/time\.h>/ d
 /^# *include <gpg-error\.h>/ s,#include <gpg-error.h>,#include <grub/gcrypt/gpg-error.h>,
+/^typedef gpg_error_t gcry_error_t;/ d
+/^typedef gpg_err_code_t gcry_err_code_t;/ d
+/^typedef struct gcry_mpi \*gcry_mpi_t;/ d
 s,_gcry_mpi_invm,gcry_mpi_invm,g
 p
\ No newline at end of file