diff --git a/src/libavrdude.h b/src/libavrdude.h
index c53cf429..3411c1b8 100644
--- a/src/libavrdude.h
+++ b/src/libavrdude.h
@@ -1564,6 +1564,9 @@ typedef struct {
 
   // Static variable from config_gram.y
  int cfgy_pin_name;             // Temporary variable for grammar parsing
+
+  // Static variable from ppi.c
+  unsigned char ppi_shadow[3];
 } cx_t;
 
 extern cx_t *cx;
diff --git a/src/ppi.c b/src/ppi.c
index ef2c9ef9..e883553f 100644
--- a/src/ppi.c
+++ b/src/ppi.c
@@ -54,7 +54,6 @@ enum {
 static int ppi_shadow_access(const union filedescriptor *fdp, int reg,
 			     unsigned char *v, unsigned char action)
 {
-  static unsigned char shadow[3];
   int shadow_num;
 
   switch (reg) {
@@ -75,14 +74,14 @@ static int ppi_shadow_access(const union filedescriptor *fdp, int reg,
 
   switch (action) {
     case PPI_SHADOWREAD:
-      *v = shadow[shadow_num];
+      *v = cx->ppi_shadow[shadow_num];
       break;
     case PPI_READ:
       DO_PPI_READ(fdp->ifd, reg, v);
-      shadow[shadow_num]=*v;
+      cx->ppi_shadow[shadow_num]=*v;
       break;
     case PPI_WRITE:
-      shadow[shadow_num]=*v;
+      cx->ppi_shadow[shadow_num]=*v;
       DO_PPI_WRITE(fdp->ifd, reg, v);
       break;
   }