diff --git a/AUTHORS b/AUTHORS
index 5ea12438609..0a0d00040d4 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -609,9 +609,9 @@ Special thanks to
    of Dreamweb and for their tremendous support.
 
    Janusz Wisniewski and Miroslaw Liminowicz from Laboratorium Komputerowe
-   Avalon for providing full source code for Soltys and letting us to
+   Avalon for providing full source code for Soltys and letting us
    redistribute the game.
 
-   Jan Nedoma for providing the sources to the Wintermute-engine, and for
-   providing support while porting the engine to ScummVM
+   Jan Nedoma for providing the sources to the Wintermute-engine, and for his
+   support while porting the engine to ScummVM.
 
diff --git a/devtools/credits.pl b/devtools/credits.pl
index e022e1a4dc7..1fd40dbab2f 100755
--- a/devtools/credits.pl
+++ b/devtools/credits.pl
@@ -1145,11 +1145,11 @@ begin_credits("Credits");
 
 	add_paragraph(
     "Janusz Wiśniewski and Miroslaw Liminowicz from Laboratorium Komputerowe Avalon ".
-    "for providing full source code for Sołtys and letting us to redistribute the game.");
+    "for providing full source code for Sołtys and letting us redistribute the game.");
 
 	add_paragraph(
-    "Jan Nedoma for providing the sources to the Wintermute-engine, and for providing ".
-    "support while porting the engine to ScummVM");
+    "Jan Nedoma for providing the sources to the Wintermute-engine, and for his ".
+    "support while porting the engine to ScummVM.");
 
 	end_section();
 
diff --git a/gui/credits.h b/gui/credits.h
index e61cc1053fe..124cf42062d 100644
--- a/gui/credits.h
+++ b/gui/credits.h
@@ -720,9 +720,9 @@ static const char *credits[] = {
 "C0""",
 "C0""Neil Dodwell and David Dew from Creative Reality for providing the source of Dreamweb and for their tremendous support.",
 "C0""",
-"C0""Janusz Wisniewski and Miroslaw Liminowicz from Laboratorium Komputerowe Avalon for providing full source code for Soltys and letting us to redistribute the game.",
+"C0""Janusz Wisniewski and Miroslaw Liminowicz from Laboratorium Komputerowe Avalon for providing full source code for Soltys and letting us redistribute the game.",
 "C0""",
-"C0""Jan Nedoma for providing the sources to the Wintermute-engine, and for providing support while porting the engine to ScummVM",
+"C0""Jan Nedoma for providing the sources to the Wintermute-engine, and for his support while porting the engine to ScummVM.",
 "C0""",
 "",
 };