diff --git a/compiler/infra/InterferenceGraph.cpp b/compiler/infra/InterferenceGraph.cpp
index 17538f0726b..c6e2b5f8d64 100644
--- a/compiler/infra/InterferenceGraph.cpp
+++ b/compiler/infra/InterferenceGraph.cpp
@@ -503,7 +503,7 @@ bool TR_InterferenceGraph::select()
 
 
 #ifdef DEBUG
-void TR_InterferenceGraph::dumpIG(char *msg)
+void TR_InterferenceGraph::dumpIG(const char *msg)
    {
    if (msg)
       {
diff --git a/compiler/infra/InterferenceGraph.hpp b/compiler/infra/InterferenceGraph.hpp
index 59d7adc84a7..251be599b84 100644
--- a/compiler/infra/InterferenceGraph.hpp
+++ b/compiler/infra/InterferenceGraph.hpp
@@ -144,9 +144,9 @@ class TR_InterferenceGraph : public TR_IGBase
    IGNodeColour findMinimumChromaticNumber();
 
 #ifdef DEBUG
-   void dumpIG(char *msg = NULL);
+   void dumpIG(const char *msg = NULL);
 #else
-   void dumpIG(char *msg = NULL) {}
+   void dumpIG(const char *msg = NULL) {}
 #endif
    };
 #endif
diff --git a/compiler/infra/SimpleRegex.cpp b/compiler/infra/SimpleRegex.cpp
index 584af0eceb3..bee17f68670 100644
--- a/compiler/infra/SimpleRegex.cpp
+++ b/compiler/infra/SimpleRegex.cpp
@@ -55,11 +55,11 @@
 namespace TR
 {
 
-SimpleRegex *SimpleRegex::create(char *&s)
+SimpleRegex *SimpleRegex::create(const char *& s)
    {
    if (s == NULL || s[0] != '{')
       return NULL;
-   char *origStr = s;
+   const char *origStr = s;
    ++s;
    bool negate = (s[0] == '^');
    if (negate)
@@ -78,7 +78,7 @@ SimpleRegex *SimpleRegex::create(char *&s)
    }
 
 
-SimpleRegex::Regex *SimpleRegex::processRegex(char *&s, bool &foundError)
+SimpleRegex::Regex *SimpleRegex::processRegex(const char *&s, bool &foundError)
    {
    // First get rid of all + and |
    //
@@ -108,10 +108,10 @@ void *SimpleRegex::Component::operator new (size_t size, PERSISTENT_NEW_DECLARE,
 
 // Process a simple_pattern: a sequence of components
 //
-SimpleRegex::Simple *SimpleRegex::processSimple(char *&s, TR_YesNoMaybe allowAlternates, bool &foundError)
+SimpleRegex::Simple *SimpleRegex::processSimple(const char *&s, TR_YesNoMaybe allowAlternates, bool &foundError)
    {
    int32_t i,lo,hi;
-   char *startSimple = s;
+   const char *startSimple = s;
 
    if (s[0] == '\0' || s[0] == ',' || s[0] == '|' || s[0] == '}')
       return NULL;
diff --git a/compiler/infra/SimpleRegex.hpp b/compiler/infra/SimpleRegex.hpp
index d2efa87cb45..114fb59b3b0 100644
--- a/compiler/infra/SimpleRegex.hpp
+++ b/compiler/infra/SimpleRegex.hpp
@@ -50,7 +50,7 @@ class SimpleRegex
 
    // Create a new regular expression
    //
-   static SimpleRegex *create(char *&s);
+   static SimpleRegex *create(const char *& s);
 
    // Check whether a string matches this regular expression
    //
@@ -139,15 +139,15 @@ class SimpleRegex
 
    private:
 
-   static Regex  *processRegex(char *&s, bool &foundError);
-   static Simple *processSimple(char *&s, TR_YesNoMaybe allowAlternates, bool &foundError);
+   static Regex  *processRegex(const char *&s, bool &foundError);
+   static Simple *processSimple(const char *&s, TR_YesNoMaybe allowAlternates, bool &foundError);
 
    Regex *_regex;
    bool   _negate;
 
    // Length and pointer to the original string that the regex was parsed from
    size_t _regexStrLen;
-   char *_regexStr;
+   const char *_regexStr;
    };
 
 }
diff --git a/compiler/infra/Statistics.hpp b/compiler/infra/Statistics.hpp
index 78c3efd3fac..fb031a52554 100644
--- a/compiler/infra/Statistics.hpp
+++ b/compiler/infra/Statistics.hpp
@@ -272,13 +272,13 @@ class TR_StatsEvents
    public:
    enum {NAME_LEN=31};
    TR_StatsEvents() {}
-   TR_StatsEvents(const char *name, char **binNames, int minEventId)
+   TR_StatsEvents(const char *name, const char **binNames, int minEventId)
       {
       init(name, binNames, minEventId);
       }
    // the init method can be used if we want to declare an array of stats
    // that are initialized later (in a for loop)
-   void init(const char *name, char **binNames, int minEventId)
+   void init(const char *name, const char **binNames, int minEventId)
       {
       strncpy(_name, name, NAME_LEN);
       _name[NAME_LEN] = 0; // just in case name is longer than _name
@@ -341,12 +341,12 @@ class TR_StatsEvents
       }
    unsigned samples() const {return _numSamples;}
    protected:
-   char     _name[NAME_LEN+1];
-   int      _bins[N];
-   char**   _binNames;
-   int      _minEventId;  // value of smallest bin
-   int      _numSamples;
-   int      _numInvalidSamples;
+   char         _name[NAME_LEN+1];
+   int          _bins[N];
+   const char **_binNames;
+   int          _minEventId;  // value of smallest bin
+   int          _numSamples;
+   int          _numInvalidSamples;
    };
 
 #endif