diff --git a/mozilla/string/obsolete/nsString.cpp b/mozilla/string/obsolete/nsString.cpp
index 2bad4c8dbb6..4377aa87498 100644
--- a/mozilla/string/obsolete/nsString.cpp
+++ b/mozilla/string/obsolete/nsString.cpp
@@ -1363,10 +1363,11 @@ NS_COM int fputs(const nsCString& aString, FILE* out)
  * @update  gess 11/15/99
  */
 void nsCString::DebugDump(void) const {
-  
+#ifdef DEBUG  
   if(mStr && (eOneByte==mCharSize)) {
     printf("\n%s",mStr);
   }
+#endif
 }
        
 //----------------------------------------------------------------------
diff --git a/mozilla/string/obsolete/nsString2.cpp b/mozilla/string/obsolete/nsString2.cpp
index b6d9a0d3dd9..e688699a156 100644
--- a/mozilla/string/obsolete/nsString2.cpp
+++ b/mozilla/string/obsolete/nsString2.cpp
@@ -1599,7 +1599,7 @@ NS_COM int fputs(const nsString& aString, FILE* out)
  * @update  gess 11/15/99
  */
 void nsString::DebugDump(void) const {
-  
+#ifdef DEBUG  
   const char* theBuffer=mStr;
   nsCAutoString temp;
 
@@ -1611,6 +1611,7 @@ void nsString::DebugDump(void) const {
   if(theBuffer) {
     printf("\n%s",theBuffer);
   }
+#endif
 }
        
 
diff --git a/mozilla/xpcom/string/obsolete/nsString.cpp b/mozilla/xpcom/string/obsolete/nsString.cpp
index 2bad4c8dbb6..4377aa87498 100644
--- a/mozilla/xpcom/string/obsolete/nsString.cpp
+++ b/mozilla/xpcom/string/obsolete/nsString.cpp
@@ -1363,10 +1363,11 @@ NS_COM int fputs(const nsCString& aString, FILE* out)
  * @update  gess 11/15/99
  */
 void nsCString::DebugDump(void) const {
-  
+#ifdef DEBUG  
   if(mStr && (eOneByte==mCharSize)) {
     printf("\n%s",mStr);
   }
+#endif
 }
        
 //----------------------------------------------------------------------
diff --git a/mozilla/xpcom/string/obsolete/nsString2.cpp b/mozilla/xpcom/string/obsolete/nsString2.cpp
index b6d9a0d3dd9..e688699a156 100644
--- a/mozilla/xpcom/string/obsolete/nsString2.cpp
+++ b/mozilla/xpcom/string/obsolete/nsString2.cpp
@@ -1599,7 +1599,7 @@ NS_COM int fputs(const nsString& aString, FILE* out)
  * @update  gess 11/15/99
  */
 void nsString::DebugDump(void) const {
-  
+#ifdef DEBUG  
   const char* theBuffer=mStr;
   nsCAutoString temp;
 
@@ -1611,6 +1611,7 @@ void nsString::DebugDump(void) const {
   if(theBuffer) {
     printf("\n%s",theBuffer);
   }
+#endif
 }