diff --git a/acinclude.m4 b/acinclude.m4
index 953ef9686..aed7a6354 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -299,12 +299,6 @@ dnl Linux systems for ages now have had stdint.h to define uint8_t, etc.
 AH_BOTTOM([
 #include <cstdint>
 
-#if SIZEOF_INT_P == 4
-  typedef uint32_t Bitu;
-  typedef int32_t Bits;
-#else
-  typedef uint64_t Bitu;
-  typedef int64_t Bits;
-#endif
-
+typedef uintptr_t Bitu;
+typedef intptr_t Bits;
 ])
diff --git a/configure.ac b/configure.ac
index a8c759fbc..eee42dd83 100644
--- a/configure.ac
+++ b/configure.ac
@@ -77,7 +77,6 @@ AC_C_CONST
 AC_C_INLINE
 AC_TYPE_SIZE_T
 AC_STRUCT_TM
-AC_CHECK_SIZEOF(int *)
 
 dnl some semi complex check for sys/socket so it works on darwin as well
 AC_CHECK_HEADERS([stdlib.h sys/types.h])