diff --git a/submodules/build/builders.d/opencore-amr.mk b/submodules/build/builders.d/opencore-amr.mk
index 99eb76438..6cc042be3 100644
--- a/submodules/build/builders.d/opencore-amr.mk
+++ b/submodules/build/builders.d/opencore-amr.mk
@@ -24,6 +24,10 @@ ifneq (,$(findstring arm,$(host)))
 endif
 
 opencore-amr_dir?=externals/opencore-amr
+
+$(BUILDER_SRC_DIR)/$(opencore-amr_dir)/configure: $(BUILDER_SRC_DIR)/$(opencore-amr_dir)/configure.ac
+        cd $(BUILDER_SRC_DIR)/$(opencore-amr_dir) && autoreconf
+
 $(BUILDER_BUILD_DIR)/$(opencore-amr_dir)/Makefile: $(BUILDER_SRC_DIR)/$(opencore-amr_dir)/configure
 	mkdir -p $(BUILDER_BUILD_DIR)/$(opencore-amr_dir)
 	cd $(BUILDER_BUILD_DIR)/$(opencore-amr_dir)/ \