diff --git a/Marlin/serial.cpp b/Marlin/serial.cpp
index 18bb3bcdd..2859b058a 100644
--- a/Marlin/serial.cpp
+++ b/Marlin/serial.cpp
@@ -25,12 +25,12 @@
 const char errormagic[] PROGMEM = "Error:";
 const char echomagic[] PROGMEM = "echo:";
 
-void serial_echopair_P(const char* s_P, const char *v)   { serialprintPGM(s_P); SERIAL_ECHO(v); }
-void serial_echopair_P(const char* s_P, char v)          { serialprintPGM(s_P); SERIAL_CHAR(v); }
-void serial_echopair_P(const char* s_P, int v)           { serialprintPGM(s_P); SERIAL_ECHO(v); }
-void serial_echopair_P(const char* s_P, long v)          { serialprintPGM(s_P); SERIAL_ECHO(v); }
-void serial_echopair_P(const char* s_P, float v)         { serialprintPGM(s_P); SERIAL_ECHO(v); }
-void serial_echopair_P(const char* s_P, double v)        { serialprintPGM(s_P); SERIAL_ECHO(v); }
-void serial_echopair_P(const char* s_P, unsigned long v) { serialprintPGM(s_P); SERIAL_ECHO(v); }
+void serial_echopair_PGM(const char* s_P, const char *v)   { serialprintPGM(s_P); SERIAL_ECHO(v); }
+void serial_echopair_PGM(const char* s_P, char v)          { serialprintPGM(s_P); SERIAL_CHAR(v); }
+void serial_echopair_PGM(const char* s_P, int v)           { serialprintPGM(s_P); SERIAL_ECHO(v); }
+void serial_echopair_PGM(const char* s_P, long v)          { serialprintPGM(s_P); SERIAL_ECHO(v); }
+void serial_echopair_PGM(const char* s_P, float v)         { serialprintPGM(s_P); SERIAL_ECHO(v); }
+void serial_echopair_PGM(const char* s_P, double v)        { serialprintPGM(s_P); SERIAL_ECHO(v); }
+void serial_echopair_PGM(const char* s_P, unsigned long v) { serialprintPGM(s_P); SERIAL_ECHO(v); }
 
 void serial_spaces(uint8_t count) { count *= (PROPORTIONAL_FONT_RATIO); while (count--) MYSERIAL0.write(' '); }
diff --git a/Marlin/serial.h b/Marlin/serial.h
index d2ce69583..5e9d9fbce 100644
--- a/Marlin/serial.h
+++ b/Marlin/serial.h
@@ -54,7 +54,7 @@ extern const char errormagic[] PROGMEM;
 #define SERIAL_PROTOCOLPGM(x)               serialprintPGM(PSTR(x))
 #define SERIAL_PROTOCOLLN(x)                do{ MYSERIAL0.print(x); SERIAL_EOL(); }while(0)
 #define SERIAL_PROTOCOLLNPGM(x)             serialprintPGM(PSTR(x "\n"))
-#define SERIAL_PROTOCOLPAIR(name, value)    serial_echopair_P(PSTR(name),(value))
+#define SERIAL_PROTOCOLPAIR(name, value)    serial_echopair_PGM(PSTR(name),(value))
 #define SERIAL_PROTOCOLLNPAIR(name, value)  do{ SERIAL_PROTOCOLPAIR(name, value); SERIAL_EOL(); }while(0)
 
 #define SERIAL_ECHO_START()            serialprintPGM(echomagic)
@@ -78,18 +78,18 @@ extern const char errormagic[] PROGMEM;
 #define SERIAL_ECHOPAIR_F(pre,value)         SERIAL_ECHOPAIR(pre, FIXFLOAT(value))
 #define SERIAL_ECHOLNPAIR_F(pre, value)      SERIAL_ECHOLNPAIR(pre, FIXFLOAT(value))
 
-void serial_echopair_P(const char* s_P, const char *v);
-void serial_echopair_P(const char* s_P, char v);
-void serial_echopair_P(const char* s_P, int v);
-void serial_echopair_P(const char* s_P, long v);
-void serial_echopair_P(const char* s_P, float v);
-void serial_echopair_P(const char* s_P, double v);
-void serial_echopair_P(const char* s_P, unsigned int v);
-void serial_echopair_P(const char* s_P, unsigned long v);
-FORCE_INLINE void serial_echopair_P(const char* s_P, uint8_t v) { serial_echopair_P(s_P, (int)v); }
-FORCE_INLINE void serial_echopair_P(const char* s_P, uint16_t v) { serial_echopair_P(s_P, (int)v); }
-FORCE_INLINE void serial_echopair_P(const char* s_P, bool v) { serial_echopair_P(s_P, (int)v); }
-FORCE_INLINE void serial_echopair_P(const char* s_P, void *v) { serial_echopair_P(s_P, (unsigned long)v); }
+void serial_echopair_PGM(const char* s_P, const char *v);
+void serial_echopair_PGM(const char* s_P, char v);
+void serial_echopair_PGM(const char* s_P, int v);
+void serial_echopair_PGM(const char* s_P, long v);
+void serial_echopair_PGM(const char* s_P, float v);
+void serial_echopair_PGM(const char* s_P, double v);
+void serial_echopair_PGM(const char* s_P, unsigned int v);
+void serial_echopair_PGM(const char* s_P, unsigned long v);
+FORCE_INLINE void serial_echopair_PGM(const char* s_P, uint8_t v) { serial_echopair_PGM(s_P, (int)v); }
+FORCE_INLINE void serial_echopair_PGM(const char* s_P, uint16_t v) { serial_echopair_PGM(s_P, (int)v); }
+FORCE_INLINE void serial_echopair_PGM(const char* s_P, bool v) { serial_echopair_PGM(s_P, (int)v); }
+FORCE_INLINE void serial_echopair_PGM(const char* s_P, void *v) { serial_echopair_PGM(s_P, (unsigned long)v); }
 
 void serial_spaces(uint8_t count);
 #define SERIAL_ECHO_SP(C)     serial_spaces(C)