diff --git a/icu4c/source/common/rbbicst.pl b/icu4c/source/common/rbbicst.pl
index a9716ed5328..362e043f0ac 100755
--- a/icu4c/source/common/rbbicst.pl
+++ b/icu4c/source/common/rbbicst.pl
@@ -233,7 +233,7 @@ foreach $setName (keys %charClasses) {
         $charClasses{$setName} = 252;}
     else {
         # Normal character class.  Fill in array with a ptr to the corresponding UnicodeSet in the state machine.
-       print "    const uint8_t kRuleSet_$setName = $i;\n";
+       print "    static const uint8_t kRuleSet_$setName = $i;\n";
         $charClasses{$setName} = $i;
         $i++;
     }
@@ -270,7 +270,7 @@ print "};\n\n";
 #
 # emit the state transition table
 #
-print "struct RBBIRuleTableEl gRuleParseStateTable[] = {\n";
+print "static const struct RBBIRuleTableEl gRuleParseStateTable[] = {\n";
 print "    {doNOP, 0, 0, 0, TRUE}\n";    # State 0 is a dummy.  Real states start with index = 1.
 for ($state=1; $state < $num_states; $state++) {
     print "    , {$state_func_name[$state],";
@@ -307,7 +307,7 @@ print " };\n";
 #
 #    This array is used for producing debugging output from the rule parser.
 #
-print "const char *RBBIRuleStateNames[] = {";
+print "static const char *RBBIRuleStateNames[] = {";
 for ($state=0; $state<$num_states; $state++) {
     if ($stateNames[$state] ne "") {
         print "     \"$stateNames[$state]\",\n";
diff --git a/icu4c/source/common/rbbirpt.h b/icu4c/source/common/rbbirpt.h
index 88af39839fb..af19e20b36e 100644
--- a/icu4c/source/common/rbbirpt.h
+++ b/icu4c/source/common/rbbirpt.h
@@ -17,11 +17,11 @@ U_NAMESPACE_BEGIN
 //
 // Character classes for RBBI rule scanning.
 //
-    const uint8_t kRuleSet_digit_char = 128;
-    const uint8_t kRuleSet_rule_char = 129;
-    const uint8_t kRuleSet_white_space = 130;
-    const uint8_t kRuleSet_name_char = 131;
-    const uint8_t kRuleSet_name_start_char = 132;
+    static const uint8_t kRuleSet_digit_char = 128;
+    static const uint8_t kRuleSet_rule_char = 129;
+    static const uint8_t kRuleSet_white_space = 130;
+    static const uint8_t kRuleSet_name_char = 131;
+    static const uint8_t kRuleSet_name_start_char = 132;
 
 
 enum RBBI_RuleParseAction {
@@ -71,7 +71,7 @@ struct RBBIRuleTableEl {
     UBool                         fNextChar;
 };
 
-struct RBBIRuleTableEl gRuleParseStateTable[] = {
+static const struct RBBIRuleTableEl gRuleParseStateTable[] = {
     {doNOP, 0, 0, 0, TRUE}
     , {doExprStart, 254, 12, 8, FALSE}     //  1      start
     , {doNOP, 130, 1,0,  TRUE}     //  2 
@@ -159,7 +159,7 @@ struct RBBIRuleTableEl gRuleParseStateTable[] = {
     , {doRuleErrorAssignExpr, 255, 85,0,  FALSE}     //  84 
     , {doExit, 255, 85,0,  TRUE}     //  85      errorDeath
  };
-const char *RBBIRuleStateNames[] = {    0,
+static const char *RBBIRuleStateNames[] = {    0,
      "start",
     0,
     0,
diff --git a/icu4c/source/common/rbbiscan.cpp b/icu4c/source/common/rbbiscan.cpp
index aff376feb94..947737dc3e1 100644
--- a/icu4c/source/common/rbbiscan.cpp
+++ b/icu4c/source/common/rbbiscan.cpp
@@ -838,8 +838,8 @@ void RBBIRuleScanner::nextChar(RBBIRuleChar &c) {
 //
 //---------------------------------------------------------------------------------
 void RBBIRuleScanner::parse() {
-    uint16_t            state;
-    RBBIRuleTableEl     *tableEl;
+    uint16_t                state;
+    const RBBIRuleTableEl  *tableEl;
 
     if (U_FAILURE(*fRB->fStatus)) {
         return;