diff --git a/CMakeLists.txt b/CMakeLists.txt
index 24ddac5..bf6929f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -67,6 +67,7 @@ set(JSON_C_SOURCES
     ./linkhash.c
     ./printbuf.c
     ./random_seed.c
+    ./strerror_override.c
 )
 
 add_library(json-c
diff --git a/json_util.c b/json_util.c
index 3a717b7..cc57e34 100644
--- a/json_util.c
+++ b/json_util.c
@@ -195,7 +195,9 @@ int json_object_to_file(const char *filename, struct json_object *obj)
 
 int json_parse_double(const char *buf, double *retval)
 {
-  return (sscanf(buf, "%lf", retval)==1 ? 0 : 1);
+  char *end;
+  *retval = strtod(buf, &end);
+  return end == buf ? 1 : 0;
 }
 
 /*