diff --git a/Makefile b/Makefile
index 310b212a..8353fad8 100644
--- a/Makefile
+++ b/Makefile
@@ -32,8 +32,8 @@ BINDIR=$(PREFIX)/bin
 # TODO - when api is finalized, only export public symbols instead of using rdynamic
 # which exports all symbols. Saves a few KB in binary.
 
-CFLAGS=-std=c99 -Wall -Wextra -Isrc/include -fpic -g
-#CFLAGS=-std=c99 -Wall -Wextra -Isrc/include -fpic -O2 -fvisibility=hidden
+#CFLAGS=-std=c99 -Wall -Wextra -Isrc/include -fpic -g
+CFLAGS=-std=c99 -Wall -Wextra -Isrc/include -fpic -O2 -fvisibility=hidden
 CLIBS=-lm -ldl
 PREFIX=/usr/local
 DST_TARGET=dst
diff --git a/src/core/util.c b/src/core/util.c
index f3aac177..636ead1f 100644
--- a/src/core/util.c
+++ b/src/core/util.c
@@ -138,7 +138,7 @@ const void *dst_strbinsearch(
 }
 
 void dst_register(const char *name, Dst value) {
-    Dst regkey = dst_cstringv(name);
+    Dst regkey = dst_csymbolv(name);
     dst_table_put(dst_vm_registry, regkey, value);
     dst_table_put(dst_vm_registry, value, regkey);
 }