diff --git a/src/script_opt/ZAM/BuiltInSupport.cc b/src/script_opt/ZAM/BuiltInSupport.cc
index 50cd60c1d6..927c07e615 100644
--- a/src/script_opt/ZAM/BuiltInSupport.cc
+++ b/src/script_opt/ZAM/BuiltInSupport.cc
@@ -72,7 +72,7 @@ void FixedCatArg::RenderInto(const ZVal& z, char*& res) {
             n = modp_dtoa2(d, res, 6);
             res += n;
 
-            if ( util::approx_equal(d, nearbyint(d), 1e-9) && std::isfinite(d) && ! strchr(tmp, 'e') ) {
+            if ( util::approx_equal(d, nearbyint(d), 1e-9) && std::isfinite(d) ) {
                 // disambiguate from integer
                 *(res++) = '.';
                 *(res++) = '0';
diff --git a/src/script_opt/ZAM/BuiltInSupport.h b/src/script_opt/ZAM/BuiltInSupport.h
index 5ca4691f96..d799e4f5e8 100644
--- a/src/script_opt/ZAM/BuiltInSupport.h
+++ b/src/script_opt/ZAM/BuiltInSupport.h
@@ -42,7 +42,6 @@ public:
 
 protected:
     TypePtr t;
-    char tmp[256];
 };
 
 class StringCatArg : public CatArg {