diff --git a/network/VerilogNamespace.cc b/network/VerilogNamespace.cc
index 48d182a7..6d1542b5 100644
--- a/network/VerilogNamespace.cc
+++ b/network/VerilogNamespace.cc
@@ -180,7 +180,7 @@ verilogToSta(const char *verilog_name)
     // Ignore leading '\'.
     verilog_name = &verilog_name[1];
     size_t verilog_name_length = strlen(verilog_name);
-    if (verilog_name[verilog_name_length - 1] == ' ')
+    if (isspace(verilog_name[verilog_name_length - 1]))
       verilog_name_length--;
     string sta_name;
     for (size_t i = 0; i < verilog_name_length; i++) {