diff --git a/src/graphics/graphics.c b/src/graphics/graphics.c
index 1aad131..a9ad608 100644
--- a/src/graphics/graphics.c
+++ b/src/graphics/graphics.c
@@ -913,7 +913,7 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
 
     void *new_arrows_lines_ptr = g_realloc(buffer_lines_origin, buffer_lines_size * sizeof(GLfloat));
     if (new_arrows_lines_ptr) buffer_lines_origin = new_arrows_lines_ptr;
-    else                       perror("In experience, can't re_allocate for arrow lines buffer.\n");
+    else                       perror("In experience, can't re_allocate for arrows lines buffer.\n");
     if (1) printf(">>>   buffer_lines_size = %d\n", buffer_lines_size);
 
 
@@ -929,7 +929,7 @@ void  __attribute__((optimize("no-unroll-loops"))) main_test_graphics (void)
 
     void *new_arrows_vertex_ptr = g_realloc(buffer_vertex_origin, buffer_vertex_size * sizeof(GLfloat));
     if (new_arrows_vertex_ptr) buffer_vertex_origin = new_arrows_vertex_ptr;
-    else                       perror("In experience, can't re_allocate for arrow vertex buffer.\n");
+    else                       perror("In experience, can't re_allocate for arrows vertex buffer.\n");
     if (1) printf(">>>   buffer_vertex_size = %d\n", buffer_vertex_size);