diff --git a/src/base/wln/wlnRtl.c b/src/base/wln/wlnRtl.c
index fa0f0cd5c..8a8e0a324 100644
--- a/src/base/wln/wlnRtl.c
+++ b/src/base/wln/wlnRtl.c
@@ -121,6 +121,9 @@ char * Wln_GetYosysName()
 }
 int Wln_ConvertToRtl( char * pCommand, char * pFileTemp )
 {
+#if defined(__wasm)
+    return 0;
+#else
     FILE * pFile;
     if ( system( pCommand ) == -1 )
     {
@@ -134,6 +137,7 @@ int Wln_ConvertToRtl( char * pCommand, char * pFileTemp )
     }
     fclose( pFile );
     return 1;
+#endif
 }
 Rtl_Lib_t * Wln_ReadSystemVerilog( char * pFileName, char * pTopModule, int fCollapse, int fVerbose )
 {