diff --git a/mrbgems/mruby-math/src/math.c b/mrbgems/mruby-math/src/math.c
index 35fcd0fa6..c6d4ca414 100644
--- a/mrbgems/mruby-math/src/math.c
+++ b/mrbgems/mruby-math/src/math.c
@@ -5,7 +5,7 @@
 */
 
 #ifdef MRB_WITHOUT_FLOAT
-# error Conflict 'MRB_WITHOUT_FLOAT' configuration in your 'build_config.rb'
+# error Math conflicts 'MRB_WITHOUT_FLOAT' configuration in your 'build_config.rb'
 #endif
 
 #include <mruby.h>
diff --git a/mrbgems/mruby-time/src/time.c b/mrbgems/mruby-time/src/time.c
index 4f0afd6c6..933689426 100644
--- a/mrbgems/mruby-time/src/time.c
+++ b/mrbgems/mruby-time/src/time.c
@@ -5,7 +5,7 @@
 */
 
 #ifdef MRB_WITHOUT_FLOAT
-# error Conflict 'MRB_WITHOUT_FLOAT' configuration in your 'build_config.rb'
+# error Time conflicts 'MRB_WITHOUT_FLOAT' configuration in your 'build_config.rb'
 #endif
 
 #include <math.h>