diff --git a/include/chaiscript/utility/json.hpp b/include/chaiscript/utility/json.hpp
index 96decc09..6fe2e584 100644
--- a/include/chaiscript/utility/json.hpp
+++ b/include/chaiscript/utility/json.hpp
@@ -567,10 +567,13 @@ struct JSONParser {
     std::string val, exp_str;
     char c = '\0';
     bool isDouble = false;
+    bool isNegative = false;
     long exp = 0;
     for (; offset < str.size() ;) {
       c = str[offset++];
-      if( (c == '-') || (c >= '0' && c <= '9') ) {
+      if( c == '-' ) {
+        isNegative = true;
+      } else if( c >= '0' && c <= '9' ) {
         val += c;
       } else if( c == '.' ) {
         val += c; 
@@ -608,12 +611,12 @@ struct JSONParser {
     --offset;
 
     if( isDouble ) {
-      return JSON(chaiscript::parse_num<double>( val ) * std::pow( 10, exp ));
+      return JSON((isNegative?-1:1) * chaiscript::parse_num<double>( val ) * std::pow( 10, exp ));
     } else {
       if( !exp_str.empty() ) {
-        return JSON(static_cast<double>(chaiscript::parse_num<long>( val )) * std::pow( 10, exp ));
+        return JSON((isNegative?-1:1) * static_cast<double>(chaiscript::parse_num<long>( val )) * std::pow( 10, exp ));
       } else {
-        return JSON(chaiscript::parse_num<long>( val ));
+        return JSON((isNegative?-1:1) * chaiscript::parse_num<long>( val ));
       }
     }
   }
diff --git a/unittests/json_3.chai b/unittests/json_3.chai
index d3f222e4..11ce7dcb 100644
--- a/unittests/json_3.chai
+++ b/unittests/json_3.chai
@@ -1 +1,2 @@
 assert_equal(from_json("100"), 100)
+assert_equal(from_json("-100"), -100)
diff --git a/unittests/json_4.chai b/unittests/json_4.chai
index 22d388c7..34ecfa9d 100644
--- a/unittests/json_4.chai
+++ b/unittests/json_4.chai
@@ -1 +1,2 @@
 assert_equal(from_json("1.234"), 1.234)
+assert_equal(from_json("-1.234"), -1.234)
diff --git a/unittests/json_9.chai b/unittests/json_9.chai
index 15127387..d8c64239 100644
--- a/unittests/json_9.chai
+++ b/unittests/json_9.chai
@@ -1,2 +1,2 @@
-assert_equal(from_json("[1,2,3]"), [1,2,3])
+assert_equal(from_json("[1,-2,3]"), [1,-2,3])