diff --git a/oursqlx/_exceptions.c b/oursqlx/_exceptions.c
index 0d76ff0..bb77f75 100644
--- a/oursqlx/_exceptions.c
+++ b/oursqlx/_exceptions.c
@@ -617,23 +617,26 @@ enum _oursqlx_exception_type _oursqlx_exc_from_errno(int err) {
             return _oursqlx_PermissionsError;
 
         default:
-           #if MYSQL_VERSION_ID >= 50700 
-              for(unsigned int i = 0; i < sizeof(errmsg_section_start)/sizeof(int); ++i) {
-                int min = errmsg_section_start[i];
-                int max = errmsg_section_start[i] + errmsg_section_size[i] - 1;
-                if ( err >= min && err <= max ) {
-                  return _oursqlx_ProgrammingError;
-                }             
-              }
-              if ( err > CR_MIN_ERROR && err < CR_MAX_ERROR) {
-                 return _oursqlx_InterfaceError;
-              }
-           #else
-              if (err >= ER_ERROR_FIRST && err <= ER_ERROR_LAST)
-                  return _oursqlx_ProgrammingError;
-              else if (err > CR_MIN_ERROR && err < CR_MAX_ERROR)
-                  return _oursqlx_InterfaceError;
-           #endif
+            #if MYSQL_VERSION_ID >= 50700
+            {
+                unsigned int i;
+                for(i = 0; i < sizeof(errmsg_section_start)/sizeof(int); ++i) {
+                    int min = errmsg_section_start[i];
+                    int max = errmsg_section_start[i] + errmsg_section_size[i] - 1;
+                    if ( err >= min && err <= max ) {
+                      return _oursqlx_ProgrammingError;
+                    }
+                }
+                if ( err > CR_MIN_ERROR && err < CR_MAX_ERROR) {
+                    return _oursqlx_InterfaceError;
+                }
+            }
+            #else
+                if (err >= ER_ERROR_FIRST && err <= ER_ERROR_LAST)
+                    return _oursqlx_ProgrammingError;
+                else if (err > CR_MIN_ERROR && err < CR_MAX_ERROR)
+                    return _oursqlx_InterfaceError;
+            #endif
     }
     return _oursqlx_UnknownError;
 }