diff --git a/lib/operators.c b/lib/operators.c
index 1ffdd1a..ef75e8e 100644
--- a/lib/operators.c
+++ b/lib/operators.c
@@ -21,7 +21,7 @@ extern int verbosity;		/* must be declared around main() */
  */
 int fimg_add(FloatImg *a, FloatImg *b, FloatImg *d)
 {
-int		idx, nbiter;
+int		idx, nbpixels;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
@@ -32,9 +32,9 @@ if (3 != a->type || 3 != b->type || 3 != d->type) {
 	return -8;
 	} 
 
-nbiter = a->width * a->height;
+nbpixels = a->width * a->height;
 
-for (idx=0; idx<nbiter; idx++) {
+for (idx=0; idx<nbpixels; idx++) {
 	d->R[idx] = a->R[idx] + b->R[idx];
 	d->G[idx] = a->G[idx] + b->G[idx];
 	d->B[idx] = a->B[idx] + b->B[idx];
@@ -48,7 +48,7 @@ return 0;
  */
 int fimg_sub(FloatImg *a, FloatImg *b, FloatImg *d)
 {
-int		idx, nbiter;
+int		idx, nbpixels;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
@@ -59,12 +59,12 @@ if (3 != a->type || 3 != b->type || 3 != d->type) {
 	return -8;
 	} 
 
-nbiter = a->width * a->height;
+nbpixels = a->width * a->height;
 
 /*		maybe we can speedup this loop for
  *		avoiding the cache strashing ?
  */
-for (idx=0; idx<nbiter; idx++) {
+for (idx=0; idx<nbpixels; idx++) {
 	d->R[idx] = fabs(a->R[idx] - b->R[idx]);
 	d->G[idx] = fabs(a->G[idx] - b->G[idx]);
 	d->B[idx] = fabs(a->B[idx] - b->B[idx]);
@@ -78,7 +78,7 @@ return 0;
  */
 int fimg_mul(FloatImg *a, FloatImg *b, FloatImg *d)
 {
-int		idx, nbiter;
+int		idx, nbpixels;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, a, b, d);
@@ -89,9 +89,9 @@ if (3 != a->type || 3 != b->type || 3 != d->type) {
 	return -8;
 	} 
 
-nbiter = a->width * a->height;
+nbpixels = a->width * a->height;
 
-for (idx=0; idx<nbiter; idx++) {
+for (idx=0; idx<nbpixels; idx++) {
 	d->R[idx] = a->R[idx] * b->R[idx];
 	d->G[idx] = a->G[idx] * b->G[idx];
 	d->B[idx] = a->B[idx] * b->B[idx];