diff --git a/poppler/PSOutputDev.cc b/poppler/PSOutputDev.cc
index dac10d0..c655652 100644
--- a/poppler/PSOutputDev.cc
+++ b/poppler/PSOutputDev.cc
@@ -258,7 +258,7 @@ static const char *prolog[] = {
   "} def",
   "~3n",
   "/opm { dup /pdfOPM exch def",
-  "      setoverprintmode } def",
+  "      /setoverprintmode where{pop setoverprintmode}{pop}ifelse  } def",
   "~23n",
   "/cs { /pdfFillXform exch def dup /pdfFillCS exch def",
   "      setcolorspace } def",
@@ -292,7 +292,7 @@ static const char *prolog[] = {
   "} def",
   "~3s",
   "/opm { dup /pdfOPM exch def",
-  "      setoverprintmode } def",
+  "      /setoverprintmode where{pop setoverprintmode}{pop}ifelse } def",
   "~23s",
   "/k { 4 copy 4 array astore /pdfFill exch def setcmykcolor",
   "     /pdfLastFill true def /pdfLastStroke false def } def",
@@ -390,7 +390,7 @@ static const char *prolog[] = {
   "~3sn",
   "  /pdfOPM where {",
   "    pop",
-  "    pdfOPM setoverprintmode",
+  "    pdfOPM /setoverprintmode where{pop setoverprintmode}{pop}ifelse ",
   "  } if",
   "~23sn",
   "} def",