diff --git a/src/cc65/codeopt.c b/src/cc65/codeopt.c
index abd5fdb63..422496792 100644
--- a/src/cc65/codeopt.c
+++ b/src/cc65/codeopt.c
@@ -101,12 +101,13 @@ static unsigned OptShift1 (CodeSeg* S)
  */
 {
     unsigned Changes = 0;
+    unsigned I;
 
     /* Generate register info */
     CS_GenRegInfo (S);
 
     /* Walk over the entries */
-    unsigned I = 0;
+    I = 0;
     while (I < CS_GetEntryCount (S)) {
 
         CodeEntry* N;
diff --git a/src/cc65/coptind.c b/src/cc65/coptind.c
index 95022e6c1..21607d0d6 100644
--- a/src/cc65/coptind.c
+++ b/src/cc65/coptind.c
@@ -805,12 +805,13 @@ unsigned OptCondBranches2 (CodeSeg* S)
  */
 {
     unsigned Changes = 0;
+    unsigned I;
 
     /* Generate register info for this step */
     CS_GenRegInfo (S);
 
     /* Walk over the entries */
-    unsigned I = 0;
+    I = 0;
     while (I < CS_GetEntryCount (S)) {
 
        	CodeEntry* N;