diff --git a/Marlin/src/pins/pins_AZSMZ_MINI.h b/Marlin/src/pins/pins_AZSMZ_MINI.h
index 36eb0ed230..6dbb3cf532 100644
--- a/Marlin/src/pins/pins_AZSMZ_MINI.h
+++ b/Marlin/src/pins/pins_AZSMZ_MINI.h
@@ -25,7 +25,7 @@
  */
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have LPC1768 selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_AZTEEG_X5_GT.h b/Marlin/src/pins/pins_AZTEEG_X5_GT.h
index 7051de4261..d942f8da14 100644
--- a/Marlin/src/pins/pins_AZTEEG_X5_GT.h
+++ b/Marlin/src/pins/pins_AZTEEG_X5_GT.h
@@ -22,11 +22,11 @@
  */
 
 /**
- * MKS SBASE pin assignments
+ * Azteeg X5 GT pin assignments
  */
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have LPC1768 selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_BIQU_BQ111_A4.h b/Marlin/src/pins/pins_BIQU_BQ111_A4.h
index 5b6fcd89db..e60d3b33de 100644
--- a/Marlin/src/pins/pins_BIQU_BQ111_A4.h
+++ b/Marlin/src/pins/pins_BIQU_BQ111_A4.h
@@ -31,7 +31,7 @@
  */
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have Re-Arm selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_COHESION3D_MINI.h b/Marlin/src/pins/pins_COHESION3D_MINI.h
index c932171b8f..13757de216 100644
--- a/Marlin/src/pins/pins_COHESION3D_MINI.h
+++ b/Marlin/src/pins/pins_COHESION3D_MINI.h
@@ -26,7 +26,7 @@
  */
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have LPC1768 selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_COHESION3D_REMIX.h b/Marlin/src/pins/pins_COHESION3D_REMIX.h
index 2ab657439d..957c8fe40a 100644
--- a/Marlin/src/pins/pins_COHESION3D_REMIX.h
+++ b/Marlin/src/pins/pins_COHESION3D_REMIX.h
@@ -26,7 +26,7 @@
  */
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have LPC1768 selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_MKS_SBASE.h b/Marlin/src/pins/pins_MKS_SBASE.h
index 28e5bd74b3..59cf74ea28 100644
--- a/Marlin/src/pins/pins_MKS_SBASE.h
+++ b/Marlin/src/pins/pins_MKS_SBASE.h
@@ -26,7 +26,7 @@
  */
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have LPC1768 selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_RAMPS.h b/Marlin/src/pins/pins_RAMPS.h
index 4e01bad76c..d87c540c9b 100644
--- a/Marlin/src/pins/pins_RAMPS.h
+++ b/Marlin/src/pins/pins_RAMPS.h
@@ -45,7 +45,9 @@
  */
 
 #if ENABLED(TARGET_LPC1768)
-  #error "Oops!  Use 'BOARD_RAMPS_RE_ARM' to build for Re-ARM."
+  #error "Oops!  Set MOTHERBOARD to an LPC1768-based board when building for LPC1768."
+#elif defined(__STM32F1__)
+  #error "Oops!  Set MOTHERBOARD to an STM32F1-based board when building for STM32F1."
 #endif
 
 #if DISABLED(IS_RAMPS_SMART) && DISABLED(IS_RAMPS_DUO) && DISABLED(IS_RAMPS4DUE) && DISABLED(TARGET_LPC1768)
diff --git a/Marlin/src/pins/pins_RAMPS_RE_ARM.h b/Marlin/src/pins/pins_RAMPS_RE_ARM.h
index ea6deba013..11fca43c52 100644
--- a/Marlin/src/pins/pins_RAMPS_RE_ARM.h
+++ b/Marlin/src/pins/pins_RAMPS_RE_ARM.h
@@ -37,7 +37,7 @@
 // numbers in parenthesis () are the mega2560 equivalent pin numbers
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have LPC1768 selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_SELENA_COMPACT.h b/Marlin/src/pins/pins_SELENA_COMPACT.h
index 828d6ba64d..f04c2b40fc 100644
--- a/Marlin/src/pins/pins_SELENA_COMPACT.h
+++ b/Marlin/src/pins/pins_SELENA_COMPACT.h
@@ -26,7 +26,7 @@
  */
 
 #ifndef TARGET_LPC1768
-  #error "Oops!  Make sure you have LPC1768 selected."
+  #error "Oops!  Make sure you have the LPC1768 environment selected in your IDE."
 #endif
 
 #ifndef BOARD_NAME
diff --git a/Marlin/src/pins/pins_STM32F1R.h b/Marlin/src/pins/pins_STM32F1R.h
index 6d73853118..f45e769532 100644
--- a/Marlin/src/pins/pins_STM32F1R.h
+++ b/Marlin/src/pins/pins_STM32F1R.h
@@ -21,7 +21,7 @@
  */
 
 #ifndef __STM32F1__
-    #error "Oops!  Make sure you have an STM32F1 board selected from the 'Tools -> Boards' menu."
+  #error "Oops!  Make sure you have an STM32F1 board selected from the 'Tools -> Boards' menu."
 #endif
 
 /**