diff --git a/chalk/chalkcolor/Makefile.am b/chalk/chalkcolor/Makefile.am
index 52d6b3383..e8667a2b5 100644
--- a/chalk/chalkcolor/Makefile.am
+++ b/chalk/chalkcolor/Makefile.am
@@ -6,6 +6,8 @@ INCLUDES  = $(KOFFICE_INCLUDES) \
     $(OPENEXR_CFLAGS) \
     $(all_includes)
 
+CXXFLAGS += $(OPENEXR_CXXFLAGS)
+
 lib_LTLIBRARIES = libchalkcolor.la
 
 if have_openexr
diff --git a/chalk/colorspaces/rgb_f16half/Makefile.am b/chalk/colorspaces/rgb_f16half/Makefile.am
index 52a94e3dc..5ff88e688 100644
--- a/chalk/colorspaces/rgb_f16half/Makefile.am
+++ b/chalk/colorspaces/rgb_f16half/Makefile.am
@@ -9,6 +9,8 @@ INCLUDES  = \
 	$(KOFFICE_INCLUDES) \
 	$(all_includes)
 
+CXXFLAGS += $(OPENEXR_CXXFLAGS)
+
 
 lib_LTLIBRARIES = libchalk_rgb_f16half.la
 libchalk_rgb_f16half_la_SOURCES = kis_rgb_f16half_colorspace.cc
diff --git a/chalk/core/Makefile.am b/chalk/core/Makefile.am
index ca7829f83..39b59372a 100644
--- a/chalk/core/Makefile.am
+++ b/chalk/core/Makefile.am
@@ -9,6 +9,7 @@ INCLUDES  = \
 	$(all_includes)
 
 #CXXFLAGS = -shared -fPIC
+CXXFLAGS += $(OPENEXR_CXXFLAGS)
 
 lib_LTLIBRARIES = libchalkimage.la