diff --git a/libs/core/core.cpp b/libs/core/core.cpp
index 0e2b83c7..3a705f49 100644
--- a/libs/core/core.cpp
+++ b/libs/core/core.cpp
@@ -237,6 +237,9 @@ double mystrtod(const char *p, char **endp) {
         int pw = strtol(p, endp, 10);
         v *= p10(pw);
     }
+    else {
+        *endp = (char *) p;
+    }
 
     return v;
 }