diff --git a/src/Makefile b/src/Makefile
index 7703335fa..631c17df6 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -90,7 +90,10 @@ ifneq ($(filter fast staticfast,$(MAKECMDGOALS)),)
     OPTFLAGS += $(OPTFLAGS_SPECIFIC)
 endif
 
-CXXFLAGS := -std=c++17 -Wall $(OPTFLAGS) $(CXXFLAGS_SPECIFIC)
+# might need -Wno-vla-cxx-extension for clang>18?
+EXTRA_WARN_SUPPRESS := -Wno-vla-extension 
+
+CXXFLAGS := -std=c++17 -Wall $(OPTFLAGS) $(CXXFLAGS_SPECIFIC) $(EXTRA_WARN_SUPPRESS)
 ICFLAGS := -I$(GSLINCDIR) -I$(BOOSTINCDIR) -I$(HDF5INCDIR) -I.
 
 LIBS := -lm -lz -ldl -lpthread
@@ -130,4 +133,4 @@ $(ODIR)/%.o: %.cpp
 # Clean-up rule
 clean:
 	@echo "Removing generated files..."
-	@rm -rf $(ODIR) $(BDIR) COMPAS
\ No newline at end of file
+	@rm -rf $(ODIR) $(BDIR) COMPAS