diff --git a/games/asteroids.cpp b/games/asteroids.cpp
index a5e7a5e8..4378aca6 100644
--- a/games/asteroids.cpp
+++ b/games/asteroids.cpp
@@ -1083,7 +1083,7 @@ char* GetCurrentVideoMode()
 using namespace Maxsi;
 extern "C" bool ReadParamString(const char* str, ...)
 {
-	if ( String::Seek(str, '\n') ) { errno = EINVAL; }
+	if ( strchr(str, '\n') ) { errno = EINVAL; }
 	const char* keyname;
 	va_list args;
 	while ( *str )
diff --git a/libmaxsi/readparamstring.cpp b/libmaxsi/readparamstring.cpp
index 32af6017..5874f57e 100644
--- a/libmaxsi/readparamstring.cpp
+++ b/libmaxsi/readparamstring.cpp
@@ -32,7 +32,7 @@ using namespace Maxsi;
 
 extern "C" bool ReadParamString(const char* str, ...)
 {
-	if ( String::Seek(str, '\n') ) { errno = EINVAL; }
+	if ( strchr(str, '\n') ) { errno = EINVAL; }
 	const char* keyname;
 	va_list args;
 	while ( *str )
diff --git a/sortix/video.cpp b/sortix/video.cpp
index e40bc6bd..4c327aa1 100644
--- a/sortix/video.cpp
+++ b/sortix/video.cpp
@@ -37,7 +37,7 @@ namespace Sortix {
 
 bool ReadParamString(const char* str, ...)
 {
-	if ( String::Seek(str, '\n') ) { errno = EINVAL; }
+	if ( strchr(str, '\n') ) { errno = EINVAL; }
 	const char* keyname;
 	va_list args;
 	while ( *str )