diff --git a/mozilla/base/src/nsString.cpp b/mozilla/base/src/nsString.cpp
index 1c5154abd00..0191c9d1b50 100644
--- a/mozilla/base/src/nsString.cpp
+++ b/mozilla/base/src/nsString.cpp
@@ -588,6 +588,9 @@ PRInt32 nsString::ToInteger(PRInt32* aErrorCode,PRInt32 aRadix) const {
       result=-result;
       break;
     }
+    else if('+'==theChar) {
+      break;
+    }
     else{
       *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
       result=0;
diff --git a/mozilla/string/obsolete/nsString.cpp b/mozilla/string/obsolete/nsString.cpp
index 1c5154abd00..0191c9d1b50 100644
--- a/mozilla/string/obsolete/nsString.cpp
+++ b/mozilla/string/obsolete/nsString.cpp
@@ -588,6 +588,9 @@ PRInt32 nsString::ToInteger(PRInt32* aErrorCode,PRInt32 aRadix) const {
       result=-result;
       break;
     }
+    else if('+'==theChar) {
+      break;
+    }
     else{
       *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
       result=0;
diff --git a/mozilla/xpcom/ds/nsString.cpp b/mozilla/xpcom/ds/nsString.cpp
index 1c5154abd00..0191c9d1b50 100644
--- a/mozilla/xpcom/ds/nsString.cpp
+++ b/mozilla/xpcom/ds/nsString.cpp
@@ -588,6 +588,9 @@ PRInt32 nsString::ToInteger(PRInt32* aErrorCode,PRInt32 aRadix) const {
       result=-result;
       break;
     }
+    else if('+'==theChar) {
+      break;
+    }
     else{
       *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
       result=0;
diff --git a/mozilla/xpcom/string/obsolete/nsString.cpp b/mozilla/xpcom/string/obsolete/nsString.cpp
index 1c5154abd00..0191c9d1b50 100644
--- a/mozilla/xpcom/string/obsolete/nsString.cpp
+++ b/mozilla/xpcom/string/obsolete/nsString.cpp
@@ -588,6 +588,9 @@ PRInt32 nsString::ToInteger(PRInt32* aErrorCode,PRInt32 aRadix) const {
       result=-result;
       break;
     }
+    else if('+'==theChar) {
+      break;
+    }
     else{
       *aErrorCode=NS_ERROR_ILLEGAL_VALUE;
       result=0;