diff --git a/library/platform_util.c b/library/platform_util.c
index 8141dd8..69d3d7a 100644
--- a/library/platform_util.c
+++ b/library/platform_util.c
@@ -44,7 +44,8 @@
 #endif
 
 // Detect platforms known to support explicit_bzero()
-#if defined(__GLIBC__) && (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 25) && defined(__unix__)
+#if defined(__GLIBC__) && (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 25) \
+    && !defined(__ARM_EABI__)
 #define MBEDTLS_PLATFORM_HAS_EXPLICIT_BZERO 1
 #endif
 #if defined(__FreeBSD__) && __FreeBSD_version >= 1100037