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-rw-r--r--oled/ss_oled.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/oled/ss_oled.h b/oled/ss_oled.h
index fe6f399..78b68d4 100644
--- a/oled/ss_oled.h
+++ b/oled/ss_oled.h
@@ -129,7 +129,7 @@ void oledSetTextWrap(SSOLED *pOLED, int bWrap);
//
// Returns 0 for success, -1 for invalid parameter
//
-int oledWriteString(SSOLED *pOLED, int iScrollX, int x, int y, char *szMsg, int iSize, int bInvert, int bRender);
+int oledWriteString(SSOLED *pOLED, int iScrollX, int x, int y, const char *szMsg, int iSize, int bInvert, int bRender);
//
// Fill the frame buffer with a byte pattern
// e.g. all off (0x00) or all on (0xff)