diff --git a/modules/js/generator/CMakeLists.txt b/modules/js/generator/CMakeLists.txt
index d135b151eb..48e3e2f92e 100644
--- a/modules/js/generator/CMakeLists.txt
+++ b/modules/js/generator/CMakeLists.txt
@@ -18,6 +18,7 @@ endforeach(m)
 
 # header blacklist
 ocv_list_filterout(opencv_hdrs "modules/.*.h$")
+ocv_list_filterout(opencv_hdrs "modules/core/include/opencv2/core/fast_math.hpp")
 ocv_list_filterout(opencv_hdrs "modules/core/.*/cuda")
 ocv_list_filterout(opencv_hdrs "modules/core/.*/opencl")
 ocv_list_filterout(opencv_hdrs "modules/core/include/opencv2/core/opengl.hpp")
diff --git a/modules/python/bindings/CMakeLists.txt b/modules/python/bindings/CMakeLists.txt
index c6db97bf28..c511b9bc80 100644
--- a/modules/python/bindings/CMakeLists.txt
+++ b/modules/python/bindings/CMakeLists.txt
@@ -47,6 +47,7 @@ endforeach(m)
 
 # header blacklist
 ocv_list_filterout(opencv_hdrs "modules/.*\\\\.h$")
+ocv_list_filterout(opencv_hdrs "modules/core/include/opencv2/core/fast_math.hpp")
 ocv_list_filterout(opencv_hdrs "modules/core/.*/cuda/")
 ocv_list_filterout(opencv_hdrs "modules/core/.*/hal/")
 ocv_list_filterout(opencv_hdrs "modules/core/.*/opencl/")
diff --git a/modules/python/src2/hdr_parser.py b/modules/python/src2/hdr_parser.py
index b5faa61289..3d11b0ef2a 100755
--- a/modules/python/src2/hdr_parser.py
+++ b/modules/python/src2/hdr_parser.py
@@ -1061,9 +1061,6 @@ class CppHeaderParser(object):
                         ):
                             depth_if_0 = 0
                             state = SCAN
-                        else:
-                            depth_if_0 += 1
-                            continue
                     elif l.startswith("#endif"):
                         depth_if_0 -= 1
                         if depth_if_0 == 0: