diff --git a/Source/build.cpp b/Source/build.cpp
index 902642c8..08373b70 100644
--- a/Source/build.cpp
+++ b/Source/build.cpp
@@ -27,6 +27,10 @@ CEXEBuild::~CEXEBuild()
 
 CEXEBuild::CEXEBuild()
 {
+  linecnt = 0;
+  fp = 0;
+  curfilename = 0;
+
   display_info=1;
   display_script=1;
   display_errors=1;
diff --git a/Source/script.cpp b/Source/script.cpp
index d3fbedb8..3d562562 100644
--- a/Source/script.cpp
+++ b/Source/script.cpp
@@ -37,6 +37,10 @@ int CEXEBuild::process_script(FILE *filepointer, char *filename)
     return PS_ERROR;
   }
   int ret=parseScript();
+
+  fp = 0;
+  curfilename = 0;
+
   if (ret == PS_ENDIF) ERROR_MSG("!endif: stray !endif\n");
   if (IS_PS_ELSE(ret)) ERROR_MSG("!else: stray !else\n");
   if (m_linebuild.getlen())