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-rw-r--r--converter/other/pamtopng.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/converter/other/pamtopng.c b/converter/other/pamtopng.c
index 68d4055d..cfff38cb 100644
--- a/converter/other/pamtopng.c
+++ b/converter/other/pamtopng.c
@@ -251,7 +251,7 @@ colorTypeFromInputType(const struct pam * const pamP) {
 -----------------------------------------------------------------------------*/
     png_byte retval;
 
-    if (pamP->depth < 1 && pamP->depth > 4)
+    if (pamP->depth < 1 || pamP->depth > 4)
         pm_error ("Number of color planes must be between 1 and 4 inclusive");
 
     if (pamP->maxval != 1 && pamP->maxval != 3 && pamP->maxval != 15 &&