diff --git a/libc/string/strchr.cpp b/libc/string/strchr.cpp
index 63ea3e24..c36a065c 100644
--- a/libc/string/strchr.cpp
+++ b/libc/string/strchr.cpp
@@ -1,6 +1,6 @@
 /*******************************************************************************
 
-    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
+    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
 
     This file is part of the Sortix C Library.
 
@@ -27,5 +27,5 @@
 extern "C" char* strchr(const char* str, int uc)
 {
 	char* ret = strchrnul(str, uc);
-	return uc == ((unsigned char*) ret)[0] ? ret : NULL;
+	return (unsigned char) uc == ((unsigned char*) ret)[0] ? ret : NULL;
 }
diff --git a/libc/string/strchrnul.cpp b/libc/string/strchrnul.cpp
index b7d07e8c..a35d75e6 100644
--- a/libc/string/strchrnul.cpp
+++ b/libc/string/strchrnul.cpp
@@ -1,6 +1,6 @@
 /*******************************************************************************
 
-    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
+    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
 
     This file is part of the Sortix C Library.
 
@@ -28,6 +28,6 @@ extern "C" char* strchrnul(const char* str, int uc)
 {
 	const unsigned char* ustr = (const unsigned char*) str;
 	for ( size_t i = 0; true; i++)
-		if ( ustr[i] == uc || !ustr[i] )
+		if ( ustr[i] == (unsigned char) uc || !ustr[i] )
 			return (char*) str + i;
 }
diff --git a/libc/string/strrchr.cpp b/libc/string/strrchr.cpp
index a0874c84..ebf380b2 100644
--- a/libc/string/strrchr.cpp
+++ b/libc/string/strrchr.cpp
@@ -1,6 +1,6 @@
 /*******************************************************************************
 
-    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
+    Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013, 2014.
 
     This file is part of the Sortix C Library.
 
@@ -30,7 +30,7 @@ extern "C" char* strrchr(const char* str, int uc)
 	const char* last = NULL;
 	for ( size_t i = 0; true; i++ )
 	{
-		if ( ustr[i] == uc )
+		if ( ustr[i] == (unsigned char) uc )
 			last = str + i;
 		if ( !ustr[i] )
 			break;