diff --git a/src/geoarrow.c b/src/geoarrow.c
index f6b1cdc..e87d3e0 100644
--- a/src/geoarrow.c
+++ b/src/geoarrow.c
@@ -4839,7 +4839,7 @@ int64_t GeoArrowUnescapeCrs(struct GeoArrowStringView crs, char* out, int64_t n)
     if (n > crs.size_bytes) {
       memcpy(out, crs.data, crs.size_bytes);
       out[crs.size_bytes] = '\0';
-    } else {
+    } else if (out != NULL) {
       memcpy(out, crs.data, n);
     }
 
diff --git a/vendor-geoarrow.sh b/vendor-geoarrow.sh
index 11bf66d..6df03d8 100755
--- a/vendor-geoarrow.sh
+++ b/vendor-geoarrow.sh
@@ -1,7 +1,7 @@
 
 rm src/geoarrow*
 
-GEOARROW_C_REF="e8cc0fd37a5cbd9cd1920c43aa4318daa220003e"
+GEOARROW_C_REF="b677e8478bd24bb2d6534d23dc289a7619f9afa9"
 
 curl -L \
     "https://github.com/geoarrow/geoarrow-c/archive/${GEOARROW_C_REF}.zip" \