diff --git a/pkg/wolfssl/Makefile b/pkg/wolfssl/Makefile
index fd2d8d2e28..3e4a326307 100644
--- a/pkg/wolfssl/Makefile
+++ b/pkg/wolfssl/Makefile
@@ -11,6 +11,12 @@ include $(RIOTBASE)/pkg/pkg.mk
 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90710#c1
 CFLAGS += -Wno-maybe-uninitialized
 
+# wolfcrypt uses uint8_t for block buffers, on which fast
+# 32 bit operations are performed. From a quick peek at the
+# code it looks like the buffers are correctly aligned, so
+# this is a false positive.
+CFLAGS += -Wno-cast-align
+
 .PHONY: wolfcrypt%
 
 all: $(filter wolfcrypt wolfcrypt-test wolfcrypt-benchmark,$(USEMODULE))