diff --git a/ChangeLog b/ChangeLog
index f09948e..7bb3c11 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -13,6 +13,9 @@ that is called by both pcre2_match() and pcre2_dfa_match().
 
 3. Add idempotent guard to pcre2_internal.h.
 
+4. Add new pcre2_config() options: PCRE2_CONFIG_NEVER_BACKSLASH_C and
+PCRE2_CONFIG_COMPILED_WIDTHS.
+
 
 Version 10.30 14-August-2017
 ----------------------------
diff --git a/doc/pcre2_config.3 b/doc/pcre2_config.3
index 1f99370..ab9623d 100644
--- a/doc/pcre2_config.3
+++ b/doc/pcre2_config.3
@@ -1,4 +1,4 @@
-.TH PCRE2_CONFIG 3 "26 May 2017" "PCRE2 10.30"
+.TH PCRE2_CONFIG 3 "16 September 2017" "PCRE2 10.31"
 .SH NAME
 PCRE2 - Perl-compatible regular expressions (revised API)
 .SH SYNOPSIS
@@ -31,8 +31,9 @@ point to a uint32_t integer variable. The available codes are:
   PCRE2_CONFIG_BSR             Indicates what \eR matches by default:
                                  PCRE2_BSR_UNICODE
                                  PCRE2_BSR_ANYCRLF
-  PCRE2_CONFIG_HEAPLIMIT       Default heap memory limit
+  PCRE2_CONFIG_COMPILED_WIDTHS Which of 8/16/32 support was compiled
   PCRE2_CONFIG_DEPTHLIMIT      Default backtracking depth limit
+  PCRE2_CONFIG_HEAPLIMIT       Default heap memory limit
 .\" JOIN
   PCRE2_CONFIG_JIT             Availability of just-in-time compiler
                                 support (1=yes 0=no)
@@ -41,6 +42,7 @@ point to a uint32_t integer variable. The available codes are:
                                  architecture for the JIT compiler
   PCRE2_CONFIG_LINKSIZE        Configured internal link size (2, 3, 4)
   PCRE2_CONFIG_MATCHLIMIT      Default internal resource limit
+  PCRE2_CONFIG_NEVER_BACKSLASH_C  Whether or not \eC is disabled
   PCRE2_CONFIG_NEWLINE         Code for the default newline sequence:
                                  PCRE2_NEWLINE_CR
                                  PCRE2_NEWLINE_LF
diff --git a/doc/pcre2api.3 b/doc/pcre2api.3
index f80ae58..4d06fe3 100644
--- a/doc/pcre2api.3
+++ b/doc/pcre2api.3
@@ -1,4 +1,4 @@
-.TH PCRE2API 3 "10 July 2017" "PCRE2 10.30"
+.TH PCRE2API 3 "16 September 2017" "PCRE2 10.31"
 .SH NAME
 PCRE2 - Perl-compatible regular expressions (revised API)
 .sp
@@ -1014,6 +1014,12 @@ sequences the \eR escape sequence matches by default. A value of
 PCRE2_BSR_UNICODE means that \eR matches any Unicode line ending sequence; a
 value of PCRE2_BSR_ANYCRLF means that \eR matches only CR, LF, or CRLF. The
 default can be overridden when a pattern is compiled.
+.sp
+  PCRE2_CONFIG_COMPILED_WIDTHS
+.sp
+The output is a uint32_t integer whose lower bits indicate which code unit
+widths were selected when PCRE2 was built. The 1-bit indicates 8-bit support, 
+and the 2-bit and 4-bit indicate 16-bit and 32-bit support, respectively.
 .sp
   PCRE2_CONFIG_DEPTHLIMIT
 .sp
@@ -1079,6 +1085,11 @@ sequence that is recognized as meaning "newline". The values are:
 .sp
 The default should normally correspond to the standard sequence for your
 operating system.
+.sp
+  PCRE2_CONFIG_NEVER_BACKSLASH_C
+.sp
+The output is a uint32_t integer that is set to one if the use of \eC was 
+permanently disabled when PCRE2 was built; otherwise it is set to zero.   
 .sp
   PCRE2_CONFIG_PARENSLIMIT
 .sp
@@ -3574,6 +3585,6 @@ Cambridge, England.
 .rs
 .sp
 .nf
-Last updated: 10 July 2017
+Last updated: 16 September 2017
 Copyright (c) 1997-2017 University of Cambridge.
 .fi
diff --git a/src/pcre2.h b/src/pcre2.h
index 7028df3..52b0ea2 100644
--- a/src/pcre2.h
+++ b/src/pcre2.h
@@ -338,6 +338,9 @@ numbers must not be changed. */
 #define PCRE2_CONFIG_UNICODE_VERSION        10
 #define PCRE2_CONFIG_VERSION                11
 #define PCRE2_CONFIG_HEAPLIMIT              12
+#define PCRE2_CONFIG_NEVER_BACKSLASH_C      13
+#define PCRE2_CONFIG_COMPILED_WIDTHS        14
+
 
 /* Types for code units in patterns and subject strings. */
 
diff --git a/src/pcre2.h.in b/src/pcre2.h.in
index 4a8e126..d873a34 100644
--- a/src/pcre2.h.in
+++ b/src/pcre2.h.in
@@ -338,6 +338,9 @@ numbers must not be changed. */
 #define PCRE2_CONFIG_UNICODE_VERSION        10
 #define PCRE2_CONFIG_VERSION                11
 #define PCRE2_CONFIG_HEAPLIMIT              12
+#define PCRE2_CONFIG_NEVER_BACKSLASH_C      13
+#define PCRE2_CONFIG_COMPILED_WIDTHS        14
+
 
 /* Types for code units in patterns and subject strings. */
 
diff --git a/src/pcre2_config.c b/src/pcre2_config.c
index d009c0a..e487b10 100644
--- a/src/pcre2_config.c
+++ b/src/pcre2_config.c
@@ -84,11 +84,13 @@ if (where == NULL)  /* Requests a length */
     return PCRE2_ERROR_BADOPTION;
 
     case PCRE2_CONFIG_BSR:
+    case PCRE2_CONFIG_COMPILED_WIDTHS:
+    case PCRE2_CONFIG_DEPTHLIMIT:
     case PCRE2_CONFIG_HEAPLIMIT:
     case PCRE2_CONFIG_JIT:
     case PCRE2_CONFIG_LINKSIZE:
     case PCRE2_CONFIG_MATCHLIMIT:
-    case PCRE2_CONFIG_DEPTHLIMIT:
+    case PCRE2_CONFIG_NEVER_BACKSLASH_C:
     case PCRE2_CONFIG_NEWLINE:
     case PCRE2_CONFIG_PARENSLIMIT:
     case PCRE2_CONFIG_STACKRECURSE:    /* Obsolete */
@@ -117,6 +119,24 @@ switch (what)
 #endif
   break;
 
+  case PCRE2_CONFIG_COMPILED_WIDTHS:
+  *((uint32_t *)where) = 0
+#ifdef SUPPORT_PCRE2_8
+  + 1
+#endif
+#ifdef SUPPORT_PCRE2_16
+  + 2
+#endif
+#ifdef SUPPORT_PCRE2_32
+  + 4
+#endif
+  ;
+  break;
+
+  case PCRE2_CONFIG_DEPTHLIMIT:
+  *((uint32_t *)where) = MATCH_LIMIT_DEPTH;
+  break;
+
   case PCRE2_CONFIG_HEAPLIMIT:
   *((uint32_t *)where) = HEAP_LIMIT;
   break;
@@ -148,14 +168,18 @@ switch (what)
   *((uint32_t *)where) = MATCH_LIMIT;
   break;
 
-  case PCRE2_CONFIG_DEPTHLIMIT:
-  *((uint32_t *)where) = MATCH_LIMIT_DEPTH;
-  break;
-
   case PCRE2_CONFIG_NEWLINE:
   *((uint32_t *)where) = NEWLINE_DEFAULT;
   break;
 
+  case PCRE2_CONFIG_NEVER_BACKSLASH_C:
+#ifdef NEVER_BACKSLASH_C
+  *((uint32_t *)where) = 1;
+#else
+  *((uint32_t *)where) = 0;
+#endif
+  break;
+
   case PCRE2_CONFIG_PARENSLIMIT:
   *((uint32_t *)where) = PARENS_NEST_LIMIT;
   break;
diff --git a/src/pcre2test.c b/src/pcre2test.c
index 7b7670d..88fe6d6 100644
--- a/src/pcre2test.c
+++ b/src/pcre2test.c
@@ -7807,15 +7807,11 @@ printf("  EBCDIC code page %s or similar\n", pcrz_cpversion());
 #endif
 #endif
 
-#ifdef SUPPORT_PCRE2_8
-printf("  8-bit support\n");
-#endif
-#ifdef SUPPORT_PCRE2_16
-printf("  16-bit support\n");
-#endif
-#ifdef SUPPORT_PCRE2_32
-printf("  32-bit support\n");
-#endif
+(void)PCRE2_CONFIG(PCRE2_CONFIG_COMPILED_WIDTHS, &optval);
+if (optval & 1) printf("  8-bit support\n");
+if (optval & 2) printf("  16-bit support\n");
+if (optval & 4) printf("  32-bit support\n");
+
 #ifdef SUPPORT_VALGRIND
 printf("  Valgrind support\n");
 #endif
@@ -7846,11 +7842,8 @@ print_newline_config(optval, FALSE);
 (void)PCRE2_CONFIG(PCRE2_CONFIG_BSR, &optval);
 printf("  \\R matches %s\n", optval? "CR, LF, or CRLF only" :
                                  "all Unicode newlines");
-#ifdef NEVER_BACKSLASH_C
-printf("  \\C is not supported\n");
-#else
-printf("  \\C is supported\n");
-#endif
+(void)PCRE2_CONFIG(PCRE2_CONFIG_NEVER_BACKSLASH_C, &optval);
+printf("  \\C is %ssupported\n", optval? "not ":"");
 (void)PCRE2_CONFIG(PCRE2_CONFIG_LINKSIZE, &optval);
 printf("  Internal link size = %d\n", optval);
 (void)PCRE2_CONFIG(PCRE2_CONFIG_PARENSLIMIT, &optval);